./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 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-more/buffer-series.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 29cbef6196dd6abb8fd0b8f82a83e7f566bfefc0 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:26:22,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:26:22,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:26:22,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:26:22,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:26:22,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:26:22,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:26:22,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:26:22,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:26:22,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:26:22,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:26:22,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:26:22,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:26:22,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:26:22,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:26:22,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:26:22,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:26:22,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:26:22,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:26:22,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:26:22,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:26:22,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:26:22,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:26:22,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:26:22,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:26:22,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:26:22,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:26:22,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:26:22,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:26:22,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:26:22,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:26:22,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:26:22,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:26:22,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:26:22,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:26:22,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:26:22,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:26:22,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:26:22,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:26:22,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:26:22,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:26:22,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:26:22,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:26:22,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:26:22,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:26:22,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:26:22,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:26:22,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:26:22,455 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:26:22,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:26:22,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:26:22,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:26:22,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:26:22,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:26:22,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:26:22,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:26:22,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:26:22,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:26:22,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:26:22,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:26:22,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:26:22,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:26:22,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:26:22,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:26:22,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:26:22,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:26:22,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:26:22,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:26:22,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:26:22,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:26:22,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:26:22,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:26:22,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29cbef6196dd6abb8fd0b8f82a83e7f566bfefc0 [2021-10-03 12:26:22,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:26:22,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:26:22,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:26:22,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:26:22,915 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:26:22,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c [2021-10-03 12:26:22,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e54ad231d/8d6b397e72c344e48207fe03e5ec655b/FLAG971560b82 [2021-10-03 12:26:23,626 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:26:23,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c [2021-10-03 12:26:23,627 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:26:23,627 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:26:23,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e54ad231d/8d6b397e72c344e48207fe03e5ec655b/FLAG971560b82 [2021-10-03 12:26:23,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e54ad231d/8d6b397e72c344e48207fe03e5ec655b [2021-10-03 12:26:23,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:26:24,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:26:24,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:26:24,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:26:24,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:26:24,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:26:23" (1/1) ... [2021-10-03 12:26:24,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbb562c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24, skipping insertion in model container [2021-10-03 12:26:24,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:26:23" (1/1) ... [2021-10-03 12:26:24,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:26:24,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:26:24,174 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:26:24,212 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-03 12:26:24,229 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-more/buffer-series.wvr.c[2293,2306] [2021-10-03 12:26:24,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:26:24,253 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:26:24,264 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:26:24,272 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-03 12:26:24,282 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-more/buffer-series.wvr.c[2293,2306] [2021-10-03 12:26:24,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:26:24,309 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:26:24,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24 WrapperNode [2021-10-03 12:26:24,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:26:24,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:26:24,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:26:24,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:26:24,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:26:24,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:26:24,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:26:24,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:26:24,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:26:24,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:26:24,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:26:24,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:26:24,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (1/1) ... [2021-10-03 12:26:24,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:26:24,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:24,467 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) [2021-10-03 12:26:24,481 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 [2021-10-03 12:26:24,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:26:24,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:26:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:26:24,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:26:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-03 12:26:24,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-03 12:26:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-03 12:26:24,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-03 12:26:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:26:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:26:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-03 12:26:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-03 12:26:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-03 12:26:24,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:26:24,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:26:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:26:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume [2021-10-03 12:26:24,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:26:24,538 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:26:25,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:26:25,481 INFO L299 CfgBuilder]: Removed 37 assume(true) statements. [2021-10-03 12:26:25,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:26:25 BoogieIcfgContainer [2021-10-03 12:26:25,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:26:25,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:26:25,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:26:25,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:26:25,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:26:23" (1/3) ... [2021-10-03 12:26:25,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:26:25, skipping insertion in model container [2021-10-03 12:26:25,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:26:24" (2/3) ... [2021-10-03 12:26:25,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:26:25, skipping insertion in model container [2021-10-03 12:26:25,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:26:25" (3/3) ... [2021-10-03 12:26:25,496 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.c [2021-10-03 12:26:25,503 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:26:25,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:26:25,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:26:25,504 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:26:25,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,579 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,580 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,583 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,584 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,584 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,585 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,586 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,587 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,587 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,587 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,588 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,588 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,588 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,588 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,589 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,592 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,593 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,594 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,596 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,598 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,599 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,600 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,600 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,600 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,600 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,601 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,602 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,603 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:26:25,614 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-03 12:26:25,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:26:25,668 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 [2021-10-03 12:26:25,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-03 12:26:25,688 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:26:25,700 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 204 transitions, 440 flow [2021-10-03 12:26:25,703 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 204 transitions, 440 flow [2021-10-03 12:26:25,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 204 transitions, 440 flow [2021-10-03 12:26:25,838 INFO L129 PetriNetUnfolder]: 19/200 cut-off events. [2021-10-03 12:26:25,839 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-03 12:26:25,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 200 events. 19/200 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2021-10-03 12:26:25,848 INFO L116 LiptonReduction]: Number of co-enabled transitions 1100 [2021-10-03 12:26:33,479 INFO L131 LiptonReduction]: Checked pairs total: 2873 [2021-10-03 12:26:33,479 INFO L133 LiptonReduction]: Total number of compositions: 184 [2021-10-03 12:26:33,489 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 40 transitions, 112 flow [2021-10-03 12:26:33,533 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-03 12:26:33,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:33,557 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] [2021-10-03 12:26:33,558 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1052019844, now seen corresponding path program 1 times [2021-10-03 12:26:33,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:33,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743561254] [2021-10-03 12:26:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:33,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:34,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:34,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743561254] [2021-10-03 12:26:34,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743561254] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:34,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:34,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-03 12:26:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013822634] [2021-10-03 12:26:34,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:26:34,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:26:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:26:34,069 INFO L87 Difference]: Start difference. First operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 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, 2 states have (on average 12.0) internal successors, (24), 2 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) [2021-10-03 12:26:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:34,145 INFO L93 Difference]: Finished difference Result 620 states and 2531 transitions. [2021-10-03 12:26:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:26:34,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 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 [2021-10-03 12:26:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:34,189 INFO L225 Difference]: With dead ends: 620 [2021-10-03 12:26:34,189 INFO L226 Difference]: Without dead ends: 591 [2021-10-03 12:26:34,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:26:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-10-03 12:26:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 441. [2021-10-03 12:26:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 4.054545454545455) internal successors, (1784), 440 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1784 transitions. [2021-10-03 12:26:34,307 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1784 transitions. Word has length 24 [2021-10-03 12:26:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:34,308 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1784 transitions. [2021-10-03 12:26:34,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 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) [2021-10-03 12:26:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1784 transitions. [2021-10-03 12:26:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:26:34,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:34,322 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] [2021-10-03 12:26:34,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:26:34,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash -85733858, now seen corresponding path program 1 times [2021-10-03 12:26:34,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:34,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948166280] [2021-10-03 12:26:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:34,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:34,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:34,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948166280] [2021-10-03 12:26:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948166280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:34,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:34,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:26:34,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236700889] [2021-10-03 12:26:34,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:34,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:34,441 INFO L87 Difference]: Start difference. First operand 441 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.5) 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) [2021-10-03 12:26:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:34,497 INFO L93 Difference]: Finished difference Result 739 states and 2848 transitions. [2021-10-03 12:26:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:26:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) 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 [2021-10-03 12:26:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:34,505 INFO L225 Difference]: With dead ends: 739 [2021-10-03 12:26:34,506 INFO L226 Difference]: Without dead ends: 689 [2021-10-03 12:26:34,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-10-03 12:26:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 645. [2021-10-03 12:26:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 4.037267080745342) internal successors, (2600), 644 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2600 transitions. [2021-10-03 12:26:34,552 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2600 transitions. Word has length 26 [2021-10-03 12:26:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:34,552 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2600 transitions. [2021-10-03 12:26:34,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) 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) [2021-10-03 12:26:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2600 transitions. [2021-10-03 12:26:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:26:34,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:34,557 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] [2021-10-03 12:26:34,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:26:34,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:34,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1305296432, now seen corresponding path program 1 times [2021-10-03 12:26:34,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:34,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130549122] [2021-10-03 12:26:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:34,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:34,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:34,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130549122] [2021-10-03 12:26:34,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130549122] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:34,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:34,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:26:34,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384313325] [2021-10-03 12:26:34,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:34,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:34,653 INFO L87 Difference]: Start difference. First operand 645 states and 2600 transitions. Second operand has 4 states, 4 states have (on average 6.5) 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) [2021-10-03 12:26:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:34,705 INFO L93 Difference]: Finished difference Result 961 states and 3846 transitions. [2021-10-03 12:26:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:26:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) 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 [2021-10-03 12:26:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:34,715 INFO L225 Difference]: With dead ends: 961 [2021-10-03 12:26:34,715 INFO L226 Difference]: Without dead ends: 933 [2021-10-03 12:26:34,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-10-03 12:26:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 933. [2021-10-03 12:26:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 4.035407725321888) internal successors, (3761), 932 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 3761 transitions. [2021-10-03 12:26:34,758 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 3761 transitions. Word has length 26 [2021-10-03 12:26:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:34,759 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 3761 transitions. [2021-10-03 12:26:34,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) 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) [2021-10-03 12:26:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 3761 transitions. [2021-10-03 12:26:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 12:26:34,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:34,764 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] [2021-10-03 12:26:34,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 12:26:34,765 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1203492082, now seen corresponding path program 2 times [2021-10-03 12:26:34,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:34,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667004379] [2021-10-03 12:26:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:34,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:34,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:34,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667004379] [2021-10-03 12:26:34,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667004379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:34,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:34,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:26:34,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779126986] [2021-10-03 12:26:34,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:34,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:34,819 INFO L87 Difference]: Start difference. First operand 933 states and 3761 transitions. Second operand has 4 states, 4 states have (on average 6.5) 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) [2021-10-03 12:26:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:34,895 INFO L93 Difference]: Finished difference Result 807 states and 3232 transitions. [2021-10-03 12:26:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:26:34,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) 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 [2021-10-03 12:26:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:34,905 INFO L225 Difference]: With dead ends: 807 [2021-10-03 12:26:34,905 INFO L226 Difference]: Without dead ends: 807 [2021-10-03 12:26:34,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:26:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-10-03 12:26:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-10-03 12:26:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 4.009925558312655) internal successors, (3232), 806 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 3232 transitions. [2021-10-03 12:26:34,947 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 3232 transitions. Word has length 26 [2021-10-03 12:26:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:34,949 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 3232 transitions. [2021-10-03 12:26:34,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) 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) [2021-10-03 12:26:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 3232 transitions. [2021-10-03 12:26:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-03 12:26:34,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:34,954 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] [2021-10-03 12:26:34,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 12:26:34,954 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1968286514, now seen corresponding path program 1 times [2021-10-03 12:26:34,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:34,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125793769] [2021-10-03 12:26:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:34,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:26:35,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:35,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125793769] [2021-10-03 12:26:35,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125793769] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:35,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:35,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:26:35,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211119285] [2021-10-03 12:26:35,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:35,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:35,036 INFO L87 Difference]: Start difference. First operand 807 states and 3232 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-10-03 12:26:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:35,091 INFO L93 Difference]: Finished difference Result 1408 states and 5134 transitions. [2021-10-03 12:26:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:26:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 28 [2021-10-03 12:26:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:35,109 INFO L225 Difference]: With dead ends: 1408 [2021-10-03 12:26:35,110 INFO L226 Difference]: Without dead ends: 1304 [2021-10-03 12:26:35,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:26:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-10-03 12:26:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 890. [2021-10-03 12:26:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.985376827896513) internal successors, (3543), 889 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3543 transitions. [2021-10-03 12:26:35,161 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3543 transitions. Word has length 28 [2021-10-03 12:26:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:35,161 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 3543 transitions. [2021-10-03 12:26:35,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-10-03 12:26:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3543 transitions. [2021-10-03 12:26:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-03 12:26:35,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:35,168 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] [2021-10-03 12:26:35,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-03 12:26:35,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1678344374, now seen corresponding path program 1 times [2021-10-03 12:26:35,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:35,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906253806] [2021-10-03 12:26:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:35,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:35,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:35,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906253806] [2021-10-03 12:26:35,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906253806] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:35,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:35,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:26:35,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102324422] [2021-10-03 12:26:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:35,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:35,287 INFO L87 Difference]: Start difference. First operand 890 states and 3543 transitions. Second operand has 4 states, 4 states have (on average 7.0) 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) [2021-10-03 12:26:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:35,324 INFO L93 Difference]: Finished difference Result 1245 states and 4695 transitions. [2021-10-03 12:26:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:26:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) 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 28 [2021-10-03 12:26:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:35,336 INFO L225 Difference]: With dead ends: 1245 [2021-10-03 12:26:35,337 INFO L226 Difference]: Without dead ends: 1141 [2021-10-03 12:26:35,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-10-03 12:26:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 941. [2021-10-03 12:26:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.973404255319149) internal successors, (3735), 940 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3735 transitions. [2021-10-03 12:26:35,393 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3735 transitions. Word has length 28 [2021-10-03 12:26:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:35,394 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 3735 transitions. [2021-10-03 12:26:35,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) 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) [2021-10-03 12:26:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3735 transitions. [2021-10-03 12:26:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-03 12:26:35,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:35,401 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, 1] [2021-10-03 12:26:35,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-03 12:26:35,401 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1737061692, now seen corresponding path program 1 times [2021-10-03 12:26:35,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:35,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965307440] [2021-10-03 12:26:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:35,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:26:35,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:35,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965307440] [2021-10-03 12:26:35,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965307440] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:35,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:35,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:26:35,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063339143] [2021-10-03 12:26:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:26:35,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:26:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:26:35,500 INFO L87 Difference]: Start difference. First operand 941 states and 3735 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:35,582 INFO L93 Difference]: Finished difference Result 1565 states and 5892 transitions. [2021-10-03 12:26:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:26:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-03 12:26:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:35,598 INFO L225 Difference]: With dead ends: 1565 [2021-10-03 12:26:35,598 INFO L226 Difference]: Without dead ends: 1502 [2021-10-03 12:26:35,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:26:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-10-03 12:26:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 943. [2021-10-03 12:26:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 3.968152866242038) internal successors, (3738), 942 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3738 transitions. [2021-10-03 12:26:35,660 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3738 transitions. Word has length 29 [2021-10-03 12:26:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:35,660 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 3738 transitions. [2021-10-03 12:26:35,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3738 transitions. [2021-10-03 12:26:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-03 12:26:35,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:35,666 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, 1] [2021-10-03 12:26:35,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-03 12:26:35,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1914528298, now seen corresponding path program 1 times [2021-10-03 12:26:35,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:35,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239886906] [2021-10-03 12:26:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:35,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:26:35,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:35,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239886906] [2021-10-03 12:26:35,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239886906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:35,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:35,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:26:35,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598260432] [2021-10-03 12:26:35,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:26:35,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:26:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:26:35,748 INFO L87 Difference]: Start difference. First operand 943 states and 3738 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:35,833 INFO L93 Difference]: Finished difference Result 1081 states and 4087 transitions. [2021-10-03 12:26:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:26:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-03 12:26:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:35,844 INFO L225 Difference]: With dead ends: 1081 [2021-10-03 12:26:35,844 INFO L226 Difference]: Without dead ends: 1062 [2021-10-03 12:26:35,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:26:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-10-03 12:26:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 944. [2021-10-03 12:26:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.963944856839873) internal successors, (3738), 943 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3738 transitions. [2021-10-03 12:26:35,901 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3738 transitions. Word has length 29 [2021-10-03 12:26:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 3738 transitions. [2021-10-03 12:26:35,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3738 transitions. [2021-10-03 12:26:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 12:26:35,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:35,906 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, 1, 1] [2021-10-03 12:26:35,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-03 12:26:35,907 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1203084002, now seen corresponding path program 1 times [2021-10-03 12:26:35,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:35,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413846821] [2021-10-03 12:26:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:35,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:26:35,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:35,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413846821] [2021-10-03 12:26:35,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413846821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:35,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474175982] [2021-10-03 12:26:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:35,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:35,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:35,977 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) [2021-10-03 12:26:36,003 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 [2021-10-03 12:26:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:26:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:26:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474175982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:36,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:36,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-03 12:26:36,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110993027] [2021-10-03 12:26:36,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 12:26:36,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 12:26:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:26:36,238 INFO L87 Difference]: Start difference. First operand 944 states and 3738 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:36,313 INFO L93 Difference]: Finished difference Result 990 states and 3828 transitions. [2021-10-03 12:26:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:26:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 12:26:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:36,324 INFO L225 Difference]: With dead ends: 990 [2021-10-03 12:26:36,324 INFO L226 Difference]: Without dead ends: 939 [2021-10-03 12:26:36,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:26:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-10-03 12:26:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 791. [2021-10-03 12:26:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.929113924050633) internal successors, (3104), 790 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3104 transitions. [2021-10-03 12:26:36,383 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3104 transitions. Word has length 30 [2021-10-03 12:26:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:36,383 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 3104 transitions. [2021-10-03 12:26:36,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3104 transitions. [2021-10-03 12:26:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 12:26:36,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:36,388 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, 1, 1] [2021-10-03 12:26:36,426 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 [2021-10-03 12:26:36,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:36,602 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1670072908, now seen corresponding path program 1 times [2021-10-03 12:26:36,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:36,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680363098] [2021-10-03 12:26:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:36,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:26:36,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:36,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680363098] [2021-10-03 12:26:36,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680363098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:36,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649679298] [2021-10-03 12:26:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:36,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:36,672 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) [2021-10-03 12:26:36,702 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 [2021-10-03 12:26:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:36,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:26:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:26:36,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649679298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:36,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:36,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-03 12:26:36,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045948888] [2021-10-03 12:26:36,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 12:26:36,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 12:26:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:26:36,933 INFO L87 Difference]: Start difference. First operand 791 states and 3104 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:37,006 INFO L93 Difference]: Finished difference Result 781 states and 2962 transitions. [2021-10-03 12:26:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:26:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 12:26:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:37,026 INFO L225 Difference]: With dead ends: 781 [2021-10-03 12:26:37,026 INFO L226 Difference]: Without dead ends: 698 [2021-10-03 12:26:37,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:26:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-10-03 12:26:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 698. [2021-10-03 12:26:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.9583931133428982) internal successors, (2759), 697 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2759 transitions. [2021-10-03 12:26:37,061 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2759 transitions. Word has length 30 [2021-10-03 12:26:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:37,061 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 2759 transitions. [2021-10-03 12:26:37,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2759 transitions. [2021-10-03 12:26:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:37,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:37,066 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, 1, 1, 1, 1, 1] [2021-10-03 12:26:37,108 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 [2021-10-03 12:26:37,280 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,SelfDestructingSolverStorable9 [2021-10-03 12:26:37,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 113949648, now seen corresponding path program 1 times [2021-10-03 12:26:37,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:37,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927522573] [2021-10-03 12:26:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:37,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:26:37,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:37,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927522573] [2021-10-03 12:26:37,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927522573] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:37,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:26:37,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:26:37,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192641532] [2021-10-03 12:26:37,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:37,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:37,345 INFO L87 Difference]: Start difference. First operand 698 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:37,379 INFO L93 Difference]: Finished difference Result 1376 states and 5568 transitions. [2021-10-03 12:26:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:26:37,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:26:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:37,394 INFO L225 Difference]: With dead ends: 1376 [2021-10-03 12:26:37,394 INFO L226 Difference]: Without dead ends: 1376 [2021-10-03 12:26:37,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:26:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-10-03 12:26:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 948. [2021-10-03 12:26:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 4.228088701161563) internal successors, (4004), 947 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 4004 transitions. [2021-10-03 12:26:37,443 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 4004 transitions. Word has length 33 [2021-10-03 12:26:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:37,443 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 4004 transitions. [2021-10-03 12:26:37,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 4004 transitions. [2021-10-03 12:26:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-03 12:26:37,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:37,449 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, 1, 1, 1, 1, 1] [2021-10-03 12:26:37,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-03 12:26:37,449 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:37,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2003817458, now seen corresponding path program 1 times [2021-10-03 12:26:37,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:37,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432745379] [2021-10-03 12:26:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:37,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:26:37,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:37,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432745379] [2021-10-03 12:26:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432745379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:37,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346824836] [2021-10-03 12:26:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:37,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:37,505 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) [2021-10-03 12:26:37,523 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 [2021-10-03 12:26:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-03 12:26:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-03 12:26:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346824836] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:26:37,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 12:26:37,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-10-03 12:26:37,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398910053] [2021-10-03 12:26:37,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:26:37,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:26:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:26:37,712 INFO L87 Difference]: Start difference. First operand 948 states and 4004 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:37,745 INFO L93 Difference]: Finished difference Result 1530 states and 6427 transitions. [2021-10-03 12:26:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:26:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-03 12:26:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:37,762 INFO L225 Difference]: With dead ends: 1530 [2021-10-03 12:26:37,762 INFO L226 Difference]: Without dead ends: 1530 [2021-10-03 12:26:37,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:26:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-10-03 12:26:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1158. [2021-10-03 12:26:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 4.269662921348314) internal successors, (4940), 1157 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 4940 transitions. [2021-10-03 12:26:37,816 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 4940 transitions. Word has length 33 [2021-10-03 12:26:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:37,817 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 4940 transitions. [2021-10-03 12:26:37,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 4940 transitions. [2021-10-03 12:26:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:26:37,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:37,823 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:37,860 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 [2021-10-03 12:26:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:38,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1884034448, now seen corresponding path program 1 times [2021-10-03 12:26:38,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:38,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961144103] [2021-10-03 12:26:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:38,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:40,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:40,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961144103] [2021-10-03 12:26:40,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961144103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:40,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827344799] [2021-10-03 12:26:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:40,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:40,682 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) [2021-10-03 12:26:40,686 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 [2021-10-03 12:26:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-03 12:26:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,007 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:26:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 68 [2021-10-03 12:26:41,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:26:41,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:41,548 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-10-03 12:26:41,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 58 treesize of output 85 [2021-10-03 12:26:41,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:26:42,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:42,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:42,374 INFO L354 Elim1Store]: treesize reduction 80, result has 47.7 percent of original size [2021-10-03 12:26:42,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 116 [2021-10-03 12:26:42,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-03 12:26:42,916 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 26 treesize of output 22 [2021-10-03 12:26:43,203 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 26 treesize of output 22 [2021-10-03 12:26:43,809 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-03 12:26:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2021-10-03 12:26:44,023 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-03 12:26:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2021-10-03 12:26:44,972 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-10-03 12:26:44,972 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 78 treesize of output 38 [2021-10-03 12:26:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:26:45,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827344799] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:45,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:26:45,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-10-03 12:26:45,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491032760] [2021-10-03 12:26:45,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-03 12:26:45,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:26:45,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-03 12:26:45,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:26:45,062 INFO L87 Difference]: Start difference. First operand 1158 states and 4940 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:26:50,841 INFO L93 Difference]: Finished difference Result 2456 states and 10419 transitions. [2021-10-03 12:26:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:26:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:26:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:26:50,888 INFO L225 Difference]: With dead ends: 2456 [2021-10-03 12:26:50,889 INFO L226 Difference]: Without dead ends: 2433 [2021-10-03 12:26:50,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 6049.5ms TimeCoverageRelationStatistics Valid=325, Invalid=2327, Unknown=0, NotChecked=0, Total=2652 [2021-10-03 12:26:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-10-03 12:26:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1324. [2021-10-03 12:26:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 4.288737717309146) internal successors, (5674), 1323 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5674 transitions. [2021-10-03 12:26:50,964 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5674 transitions. Word has length 35 [2021-10-03 12:26:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:26:50,964 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 5674 transitions. [2021-10-03 12:26:50,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:26:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5674 transitions. [2021-10-03 12:26:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:26:50,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:26:50,971 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:26:51,010 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 [2021-10-03 12:26:51,185 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,SelfDestructingSolverStorable12 [2021-10-03 12:26:51,185 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:26:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:26:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1459876994, now seen corresponding path program 2 times [2021-10-03 12:26:51,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:26:51,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472325013] [2021-10-03 12:26:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:26:51,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:26:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:26:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:26:53,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:26:53,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472325013] [2021-10-03 12:26:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472325013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:26:53,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588123469] [2021-10-03 12:26:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:26:53,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:26:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:26:53,414 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) [2021-10-03 12:26:53,433 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 [2021-10-03 12:26:53,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:26:53,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:26:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-03 12:26:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:26:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:53,840 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:26:53,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 59 [2021-10-03 12:26:54,111 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 24 treesize of output 20 [2021-10-03 12:26:54,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,334 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-03 12:26:54,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 81 [2021-10-03 12:26:54,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:26:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:26:54,989 INFO L354 Elim1Store]: treesize reduction 104, result has 35.4 percent of original size [2021-10-03 12:26:54,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 87 treesize of output 127 [2021-10-03 12:26:59,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-03 12:26:59,542 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 131 treesize of output 127 [2021-10-03 12:27:00,514 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 184 treesize of output 180 [2021-10-03 12:27:01,869 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:27:01,870 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 156 treesize of output 158 [2021-10-03 12:27:02,349 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:27:02,350 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 111 treesize of output 113 [2021-10-03 12:27:02,939 INFO L354 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2021-10-03 12:27:02,939 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 60 treesize of output 56 [2021-10-03 12:27:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:03,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588123469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:03,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:03,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-03 12:27:03,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189237325] [2021-10-03 12:27:03,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:27:03,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:27:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:27:03,005 INFO L87 Difference]: Start difference. First operand 1324 states and 5674 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2021-10-03 12:27:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:07,920 INFO L93 Difference]: Finished difference Result 2801 states and 11937 transitions. [2021-10-03 12:27:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:27:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 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 35 [2021-10-03 12:27:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:07,939 INFO L225 Difference]: With dead ends: 2801 [2021-10-03 12:27:07,939 INFO L226 Difference]: Without dead ends: 2778 [2021-10-03 12:27:07,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5293.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-10-03 12:27:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-10-03 12:27:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 1576. [2021-10-03 12:27:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 4.290793650793651) internal successors, (6758), 1575 states have internal predecessors, (6758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 6758 transitions. [2021-10-03 12:27:08,034 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 6758 transitions. Word has length 35 [2021-10-03 12:27:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:08,035 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 6758 transitions. [2021-10-03 12:27:08,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2021-10-03 12:27:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 6758 transitions. [2021-10-03 12:27:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:27:08,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:08,043 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:08,080 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 [2021-10-03 12:27:08,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:08,258 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2022178316, now seen corresponding path program 3 times [2021-10-03 12:27:08,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:08,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117075444] [2021-10-03 12:27:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:08,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:10,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:10,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117075444] [2021-10-03 12:27:10,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117075444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:10,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659880944] [2021-10-03 12:27:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:27:10,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:10,582 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) [2021-10-03 12:27:10,585 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 [2021-10-03 12:27:11,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:27:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-03 12:27:11,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:12,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:27:12,159 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:27:12,159 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 39 treesize of output 41 [2021-10-03 12:27:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:27:12,340 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:27:12,340 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 39 treesize of output 41 [2021-10-03 12:27:12,948 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-03 12:27:12,949 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 58 treesize of output 42 [2021-10-03 12:27:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:13,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659880944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:13,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:13,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-03 12:27:13,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315010993] [2021-10-03 12:27:13,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:27:13,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:27:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:27:13,039 INFO L87 Difference]: Start difference. First operand 1576 states and 6758 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:16,367 INFO L93 Difference]: Finished difference Result 2813 states and 12024 transitions. [2021-10-03 12:27:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:27:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:27:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:16,384 INFO L225 Difference]: With dead ends: 2813 [2021-10-03 12:27:16,384 INFO L226 Difference]: Without dead ends: 2790 [2021-10-03 12:27:16,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3627.6ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:27:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2021-10-03 12:27:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1596. [2021-10-03 12:27:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 4.292163009404389) internal successors, (6846), 1595 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 6846 transitions. [2021-10-03 12:27:16,455 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 6846 transitions. Word has length 35 [2021-10-03 12:27:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:16,455 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 6846 transitions. [2021-10-03 12:27:16,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 6846 transitions. [2021-10-03 12:27:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:27:16,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:16,477 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:16,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-03 12:27:16,692 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,SelfDestructingSolverStorable14 [2021-10-03 12:27:16,693 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1944702868, now seen corresponding path program 4 times [2021-10-03 12:27:16,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:16,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541415719] [2021-10-03 12:27:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:16,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:19,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:19,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541415719] [2021-10-03 12:27:19,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541415719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:19,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691521303] [2021-10-03 12:27:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:27:19,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:19,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:19,559 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) [2021-10-03 12:27:19,561 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 [2021-10-03 12:27:20,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:27:20,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-03 12:27:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:20,208 INFO L354 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2021-10-03 12:27:20,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 47 [2021-10-03 12:27:20,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:20,938 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-03 12:27:20,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 58 treesize of output 89 [2021-10-03 12:27:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:22,623 INFO L354 Elim1Store]: treesize reduction 144, result has 31.1 percent of original size [2021-10-03 12:27:22,624 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 85 treesize of output 133 [2021-10-03 12:27:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:27:24,265 INFO L354 Elim1Store]: treesize reduction 71, result has 22.0 percent of original size [2021-10-03 12:27:24,266 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 60 treesize of output 62 [2021-10-03 12:27:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:27:24,518 INFO L354 Elim1Store]: treesize reduction 45, result has 30.8 percent of original size [2021-10-03 12:27:24,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2021-10-03 12:27:25,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:27:25,200 INFO L354 Elim1Store]: treesize reduction 90, result has 41.2 percent of original size [2021-10-03 12:27:25,201 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 68 treesize of output 90 [2021-10-03 12:27:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:27:25,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691521303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:25,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:25,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-03 12:27:25,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871792509] [2021-10-03 12:27:25,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-03 12:27:25,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-03 12:27:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:27:25,410 INFO L87 Difference]: Start difference. First operand 1596 states and 6846 transitions. Second operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:32,862 INFO L93 Difference]: Finished difference Result 3540 states and 14901 transitions. [2021-10-03 12:27:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-03 12:27:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:27:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:32,881 INFO L225 Difference]: With dead ends: 3540 [2021-10-03 12:27:32,882 INFO L226 Difference]: Without dead ends: 3500 [2021-10-03 12:27:32,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 7018.3ms TimeCoverageRelationStatistics Valid=377, Invalid=3405, Unknown=0, NotChecked=0, Total=3782 [2021-10-03 12:27:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-10-03 12:27:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1774. [2021-10-03 12:27:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 4.23463056965595) internal successors, (7508), 1773 states have internal predecessors, (7508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 7508 transitions. [2021-10-03 12:27:32,965 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 7508 transitions. Word has length 35 [2021-10-03 12:27:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:32,966 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 7508 transitions. [2021-10-03 12:27:32,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 7508 transitions. [2021-10-03 12:27:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:27:32,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:32,991 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:33,030 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 [2021-10-03 12:27:33,204 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,SelfDestructingSolverStorable15 [2021-10-03 12:27:33,205 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:33,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2080330338, now seen corresponding path program 5 times [2021-10-03 12:27:33,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:33,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116422288] [2021-10-03 12:27:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:33,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:35,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:35,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116422288] [2021-10-03 12:27:35,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116422288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:35,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481838515] [2021-10-03 12:27:35,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:27:35,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:35,772 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) [2021-10-03 12:27:35,779 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 [2021-10-03 12:27:36,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:27:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-03 12:27:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,521 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-03 12:27:36,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 80 [2021-10-03 12:27:36,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:27:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,059 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-03 12:27:37,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 58 treesize of output 97 [2021-10-03 12:27:37,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:27:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:37,762 INFO L354 Elim1Store]: treesize reduction 68, result has 47.3 percent of original size [2021-10-03 12:27:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 60 treesize of output 104 [2021-10-03 12:27:37,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-03 12:27:38,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 426 treesize of output 422 [2021-10-03 12:27:39,277 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 245 treesize of output 241 [2021-10-03 12:27:40,294 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:27:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 117 [2021-10-03 12:27:40,707 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:27:40,708 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 3 case distinctions, treesize of input 90 treesize of output 92 [2021-10-03 12:27:41,497 INFO L354 Elim1Store]: treesize reduction 37, result has 30.2 percent of original size [2021-10-03 12:27:41,498 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 64 treesize of output 40 [2021-10-03 12:27:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:27:41,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481838515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:41,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:41,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-03 12:27:41,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022898231] [2021-10-03 12:27:41,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:27:41,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:27:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:27:41,557 INFO L87 Difference]: Start difference. First operand 1774 states and 7508 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2021-10-03 12:27:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:46,829 INFO L93 Difference]: Finished difference Result 3380 states and 14284 transitions. [2021-10-03 12:27:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:27:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 35 [2021-10-03 12:27:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:46,849 INFO L225 Difference]: With dead ends: 3380 [2021-10-03 12:27:46,849 INFO L226 Difference]: Without dead ends: 3357 [2021-10-03 12:27:46,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5611.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2021-10-03 12:27:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-10-03 12:27:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 1934. [2021-10-03 12:27:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 4.235902741852043) internal successors, (8188), 1933 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 8188 transitions. [2021-10-03 12:27:46,936 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 8188 transitions. Word has length 35 [2021-10-03 12:27:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:46,936 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 8188 transitions. [2021-10-03 12:27:46,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2021-10-03 12:27:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 8188 transitions. [2021-10-03 12:27:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:27:46,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:46,945 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:46,985 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 [2021-10-03 12:27:47,160 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,SelfDestructingSolverStorable16 [2021-10-03 12:27:47,161 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1176770366, now seen corresponding path program 6 times [2021-10-03 12:27:47,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:47,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863136712] [2021-10-03 12:27:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:47,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:49,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:49,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863136712] [2021-10-03 12:27:49,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863136712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:49,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311293049] [2021-10-03 12:27:49,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:27:49,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:49,645 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) [2021-10-03 12:27:49,646 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 [2021-10-03 12:27:50,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:27:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:27:50,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-03 12:27:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:51,171 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:27:51,172 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 39 treesize of output 41 [2021-10-03 12:27:51,299 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:27:51,299 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 39 treesize of output 41 [2021-10-03 12:27:51,688 INFO L354 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2021-10-03 12:27:51,689 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 54 treesize of output 50 [2021-10-03 12:27:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:27:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311293049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:51,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:27:51,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2021-10-03 12:27:51,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323977657] [2021-10-03 12:27:51,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:27:51,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:27:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:27:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:27:51,751 INFO L87 Difference]: Start difference. First operand 1934 states and 8188 transitions. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:27:54,767 INFO L93 Difference]: Finished difference Result 3851 states and 16203 transitions. [2021-10-03 12:27:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:27:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:27:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:27:54,785 INFO L225 Difference]: With dead ends: 3851 [2021-10-03 12:27:54,786 INFO L226 Difference]: Without dead ends: 3828 [2021-10-03 12:27:54,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2873.9ms TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 12:27:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2021-10-03 12:27:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2231. [2021-10-03 12:27:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 4.252017937219731) internal successors, (9482), 2230 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 9482 transitions. [2021-10-03 12:27:54,887 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 9482 transitions. Word has length 35 [2021-10-03 12:27:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:27:54,888 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 9482 transitions. [2021-10-03 12:27:54,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:27:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 9482 transitions. [2021-10-03 12:27:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:27:54,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:27:54,897 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:27:54,938 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 [2021-10-03 12:27:55,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:55,104 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:27:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:27:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1289099410, now seen corresponding path program 7 times [2021-10-03 12:27:55,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:27:55,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861516381] [2021-10-03 12:27:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:27:55,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:27:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:27:57,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:27:57,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861516381] [2021-10-03 12:27:57,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861516381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:27:57,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952612172] [2021-10-03 12:27:57,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:27:57,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:27:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:27:57,644 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) [2021-10-03 12:27:57,645 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 [2021-10-03 12:27:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:27:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-03 12:27:58,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:27:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:58,601 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:27:58,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 59 [2021-10-03 12:27:58,857 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 11 treesize of output 7 [2021-10-03 12:27:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,105 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-03 12:27:59,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 81 [2021-10-03 12:27:59,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:27:59,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:27:59,784 INFO L354 Elim1Store]: treesize reduction 104, result has 35.4 percent of original size [2021-10-03 12:27:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 87 treesize of output 127 [2021-10-03 12:28:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-03 12:28:03,348 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 131 treesize of output 127 [2021-10-03 12:28:04,335 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 184 treesize of output 180 [2021-10-03 12:28:05,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:28:05,868 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:28:05,869 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 156 treesize of output 158 [2021-10-03 12:28:06,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:28:06,882 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-03 12:28:06,883 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 122 treesize of output 127 [2021-10-03 12:28:07,381 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-03 12:28:07,381 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 58 treesize of output 42 [2021-10-03 12:28:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952612172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:07,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:07,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-03 12:28:07,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426106712] [2021-10-03 12:28:07,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-03 12:28:07,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-03 12:28:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:28:07,479 INFO L87 Difference]: Start difference. First operand 2231 states and 9482 transitions. Second operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:28:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:13,193 INFO L93 Difference]: Finished difference Result 3796 states and 16163 transitions. [2021-10-03 12:28:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:28:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:28:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:13,209 INFO L225 Difference]: With dead ends: 3796 [2021-10-03 12:28:13,210 INFO L226 Difference]: Without dead ends: 3773 [2021-10-03 12:28:13,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 6771.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2021-10-03 12:28:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-10-03 12:28:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2255. [2021-10-03 12:28:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 4.252883762200533) internal successors, (9586), 2254 states have internal predecessors, (9586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:28:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 9586 transitions. [2021-10-03 12:28:13,306 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 9586 transitions. Word has length 35 [2021-10-03 12:28:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:13,307 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 9586 transitions. [2021-10-03 12:28:13,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:28:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 9586 transitions. [2021-10-03 12:28:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:28:13,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:13,316 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:13,359 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 [2021-10-03 12:28:13,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:13,530 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash 950582838, now seen corresponding path program 8 times [2021-10-03 12:28:13,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:13,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676249657] [2021-10-03 12:28:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:13,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:16,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:16,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676249657] [2021-10-03 12:28:16,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676249657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:16,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506199424] [2021-10-03 12:28:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:28:16,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:16,327 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) [2021-10-03 12:28:16,328 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 [2021-10-03 12:28:17,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:28:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:28:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:17,357 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 238 treesize of output 222 [2021-10-03 12:28:18,495 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:28:18,496 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 43 treesize of output 45 [2021-10-03 12:28:18,815 INFO L354 Elim1Store]: treesize reduction 148, result has 16.9 percent of original size [2021-10-03 12:28:18,816 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 54 treesize of output 59 [2021-10-03 12:28:19,115 INFO L354 Elim1Store]: treesize reduction 14, result has 71.4 percent of original size [2021-10-03 12:28:19,119 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 56 treesize of output 54 [2021-10-03 12:28:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:28:19,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506199424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:19,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:19,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-10-03 12:28:19,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639207311] [2021-10-03 12:28:19,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:28:19,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:19,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:28:19,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:28:19,226 INFO L87 Difference]: Start difference. First operand 2255 states and 9586 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2021-10-03 12:28:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:24,548 INFO L93 Difference]: Finished difference Result 3821 states and 16106 transitions. [2021-10-03 12:28:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:28:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 35 [2021-10-03 12:28:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:24,564 INFO L225 Difference]: With dead ends: 3821 [2021-10-03 12:28:24,564 INFO L226 Difference]: Without dead ends: 3798 [2021-10-03 12:28:24,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 5079.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-10-03 12:28:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-10-03 12:28:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2234. [2021-10-03 12:28:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 4.274966412897447) internal successors, (9546), 2233 states have internal predecessors, (9546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:28:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 9546 transitions. [2021-10-03 12:28:24,655 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 9546 transitions. Word has length 35 [2021-10-03 12:28:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:24,655 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 9546 transitions. [2021-10-03 12:28:24,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2021-10-03 12:28:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 9546 transitions. [2021-10-03 12:28:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:28:24,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:24,664 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:24,707 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 [2021-10-03 12:28:24,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:24,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash 711590692, now seen corresponding path program 9 times [2021-10-03 12:28:24,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:24,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834972717] [2021-10-03 12:28:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:24,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:27,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:27,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834972717] [2021-10-03 12:28:27,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834972717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:27,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059558653] [2021-10-03 12:28:27,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:28:27,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:27,460 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) [2021-10-03 12:28:27,461 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 [2021-10-03 12:28:28,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:28:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-03 12:28:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:29,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:28:29,725 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:28:29,725 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 39 treesize of output 41 [2021-10-03 12:28:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:28:30,385 INFO L354 Elim1Store]: treesize reduction 120, result has 24.1 percent of original size [2021-10-03 12:28:30,386 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 67 treesize of output 72 [2021-10-03 12:28:30,521 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-03 12:28:30,522 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 37 treesize of output 25 [2021-10-03 12:28:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:28:30,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059558653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:30,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:30,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-10-03 12:28:30,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170882342] [2021-10-03 12:28:30,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:28:30,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:28:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:28:30,608 INFO L87 Difference]: Start difference. First operand 2234 states and 9546 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2021-10-03 12:28:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:35,106 INFO L93 Difference]: Finished difference Result 3613 states and 15309 transitions. [2021-10-03 12:28:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:28:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 35 [2021-10-03 12:28:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:35,116 INFO L225 Difference]: With dead ends: 3613 [2021-10-03 12:28:35,117 INFO L226 Difference]: Without dead ends: 3590 [2021-10-03 12:28:35,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4460.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-10-03 12:28:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2021-10-03 12:28:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2254. [2021-10-03 12:28:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 4.27075011096316) internal successors, (9622), 2253 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:28:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 9622 transitions. [2021-10-03 12:28:35,194 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 9622 transitions. Word has length 35 [2021-10-03 12:28:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:35,195 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 9622 transitions. [2021-10-03 12:28:35,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2021-10-03 12:28:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 9622 transitions. [2021-10-03 12:28:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:28:35,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:35,203 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:35,242 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 [2021-10-03 12:28:35,416 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,SelfDestructingSolverStorable20 [2021-10-03 12:28:35,417 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1032119438, now seen corresponding path program 10 times [2021-10-03 12:28:35,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:35,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291013929] [2021-10-03 12:28:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:35,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:28:37,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291013929] [2021-10-03 12:28:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291013929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881866379] [2021-10-03 12:28:37,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:28:37,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:37,259 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) [2021-10-03 12:28:37,260 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 [2021-10-03 12:28:38,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:28:38,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:28:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-03 12:28:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:28:38,471 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 122 treesize of output 118 [2021-10-03 12:28:38,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-03 12:28:38,876 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 24 treesize of output 20 [2021-10-03 12:28:39,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 12:28:39,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-03 12:28:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:28:39,454 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 87 treesize of output 83 [2021-10-03 12:28:39,765 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 56 treesize of output 52 [2021-10-03 12:28:40,616 INFO L354 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-10-03 12:28:40,616 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 64 treesize of output 66 [2021-10-03 12:28:41,467 INFO L354 Elim1Store]: treesize reduction 234, result has 13.3 percent of original size [2021-10-03 12:28:41,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 81 [2021-10-03 12:28:42,863 INFO L354 Elim1Store]: treesize reduction 70, result has 38.6 percent of original size [2021-10-03 12:28:42,863 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 87 treesize of output 83 [2021-10-03 12:28:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:42,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881866379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:42,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:28:42,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 31 [2021-10-03 12:28:42,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831381478] [2021-10-03 12:28:42,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-03 12:28:42,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:28:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-03 12:28:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:28:42,923 INFO L87 Difference]: Start difference. First operand 2254 states and 9622 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-10-03 12:28:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:28:56,597 INFO L93 Difference]: Finished difference Result 4605 states and 19386 transitions. [2021-10-03 12:28:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-03 12:28:56,597 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 35 [2021-10-03 12:28:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:28:56,615 INFO L225 Difference]: With dead ends: 4605 [2021-10-03 12:28:56,616 INFO L226 Difference]: Without dead ends: 4582 [2021-10-03 12:28:56,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 9807.8ms TimeCoverageRelationStatistics Valid=358, Invalid=3301, Unknown=1, NotChecked=0, Total=3660 [2021-10-03 12:28:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-10-03 12:28:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 2450. [2021-10-03 12:28:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 4.260514495712536) internal successors, (10434), 2449 states have internal predecessors, (10434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:28:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 10434 transitions. [2021-10-03 12:28:56,714 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 10434 transitions. Word has length 35 [2021-10-03 12:28:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:28:56,715 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 10434 transitions. [2021-10-03 12:28:56,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-10-03 12:28:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 10434 transitions. [2021-10-03 12:28:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:28:56,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:28:56,724 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:28:56,767 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 [2021-10-03 12:28:56,937 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,SelfDestructingSolverStorable21 [2021-10-03 12:28:56,938 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:28:56,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:28:56,939 INFO L82 PathProgramCache]: Analyzing trace with hash -842926610, now seen corresponding path program 11 times [2021-10-03 12:28:56,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:28:56,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63277306] [2021-10-03 12:28:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:28:56,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:28:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:28:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:28:59,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:28:59,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63277306] [2021-10-03 12:28:59,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63277306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:28:59,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459792752] [2021-10-03 12:28:59,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:28:59,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:28:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:28:59,908 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) [2021-10-03 12:28:59,909 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 [2021-10-03 12:29:01,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:29:01,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-03 12:29:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:01,239 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 328 treesize of output 296 [2021-10-03 12:29:02,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:02,294 INFO L354 Elim1Store]: treesize reduction 71, result has 22.0 percent of original size [2021-10-03 12:29:02,295 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 44 treesize of output 46 [2021-10-03 12:29:02,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:02,688 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-10-03 12:29:02,689 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 59 treesize of output 60 [2021-10-03 12:29:03,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:03,348 INFO L354 Elim1Store]: treesize reduction 31, result has 65.9 percent of original size [2021-10-03 12:29:03,349 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 68 treesize of output 85 [2021-10-03 12:29:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:29:03,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459792752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:03,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:03,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-10-03 12:29:03,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564599282] [2021-10-03 12:29:03,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-03 12:29:03,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:03,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-03 12:29:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:29:03,553 INFO L87 Difference]: Start difference. First operand 2450 states and 10434 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) [2021-10-03 12:29:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:08,772 INFO L93 Difference]: Finished difference Result 5952 states and 25156 transitions. [2021-10-03 12:29:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-03 12:29:08,773 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 35 [2021-10-03 12:29:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:08,790 INFO L225 Difference]: With dead ends: 5952 [2021-10-03 12:29:08,790 INFO L226 Difference]: Without dead ends: 5912 [2021-10-03 12:29:08,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 4917.2ms TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-10-03 12:29:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-10-03 12:29:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2466. [2021-10-03 12:29:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 4.264908722109533) internal successors, (10513), 2465 states have internal predecessors, (10513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 10513 transitions. [2021-10-03 12:29:08,879 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 10513 transitions. Word has length 35 [2021-10-03 12:29:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 10513 transitions. [2021-10-03 12:29:08,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) [2021-10-03 12:29:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 10513 transitions. [2021-10-03 12:29:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:29:08,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:08,889 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:08,934 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 [2021-10-03 12:29:09,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:09,104 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2108583904, now seen corresponding path program 12 times [2021-10-03 12:29:09,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:09,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943563739] [2021-10-03 12:29:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:09,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:10,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:10,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943563739] [2021-10-03 12:29:10,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943563739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:10,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146056376] [2021-10-03 12:29:10,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:29:10,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:10,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:10,910 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) [2021-10-03 12:29:10,911 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 [2021-10-03 12:29:12,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:29:12,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:12,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-03 12:29:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:13,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:13,265 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:29:13,265 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 39 treesize of output 41 [2021-10-03 12:29:13,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:13,867 INFO L354 Elim1Store]: treesize reduction 128, result has 24.7 percent of original size [2021-10-03 12:29:13,868 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 65 treesize of output 70 [2021-10-03 12:29:14,016 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-03 12:29:14,016 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 37 treesize of output 25 [2021-10-03 12:29:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:29:14,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146056376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:14,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:14,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-10-03 12:29:14,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973633930] [2021-10-03 12:29:14,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:29:14,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:29:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:29:14,099 INFO L87 Difference]: Start difference. First operand 2466 states and 10513 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:18,786 INFO L93 Difference]: Finished difference Result 4892 states and 20711 transitions. [2021-10-03 12:29:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:29:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:29:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:18,800 INFO L225 Difference]: With dead ends: 4892 [2021-10-03 12:29:18,800 INFO L226 Difference]: Without dead ends: 4869 [2021-10-03 12:29:18,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2542.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:29:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2021-10-03 12:29:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 2513. [2021-10-03 12:29:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2512 states have (on average 4.257165605095541) internal successors, (10694), 2512 states have internal predecessors, (10694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 10694 transitions. [2021-10-03 12:29:18,883 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 10694 transitions. Word has length 35 [2021-10-03 12:29:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:18,884 INFO L470 AbstractCegarLoop]: Abstraction has 2513 states and 10694 transitions. [2021-10-03 12:29:18,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 10694 transitions. [2021-10-03 12:29:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:29:18,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:18,892 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:18,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:19,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:19,093 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1799869512, now seen corresponding path program 13 times [2021-10-03 12:29:19,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:19,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052347093] [2021-10-03 12:29:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:19,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:20,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:20,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052347093] [2021-10-03 12:29:20,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052347093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:20,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367150122] [2021-10-03 12:29:20,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:29:20,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:20,778 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) [2021-10-03 12:29:20,779 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 [2021-10-03 12:29:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-03 12:29:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:22,283 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 14 treesize of output 12 [2021-10-03 12:29:22,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-03 12:29:22,682 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 24 treesize of output 20 [2021-10-03 12:29:22,835 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 12:29:22,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-03 12:29:23,002 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 20 treesize of output 16 [2021-10-03 12:29:23,225 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 22 treesize of output 18 [2021-10-03 12:29:23,426 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 22 treesize of output 18 [2021-10-03 12:29:24,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:24,086 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-03 12:29:24,086 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 54 treesize of output 63 [2021-10-03 12:29:24,294 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:29:24,295 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 43 treesize of output 45 [2021-10-03 12:29:24,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:24,882 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 51 treesize of output 41 [2021-10-03 12:29:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367150122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:24,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:24,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-03 12:29:24,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218550383] [2021-10-03 12:29:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-03 12:29:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-03 12:29:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:29:24,936 INFO L87 Difference]: Start difference. First operand 2513 states and 10694 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) [2021-10-03 12:29:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:29,182 INFO L93 Difference]: Finished difference Result 4241 states and 17987 transitions. [2021-10-03 12:29:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:29:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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 35 [2021-10-03 12:29:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:29,195 INFO L225 Difference]: With dead ends: 4241 [2021-10-03 12:29:29,196 INFO L226 Difference]: Without dead ends: 4218 [2021-10-03 12:29:29,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3857.5ms TimeCoverageRelationStatistics Valid=223, Invalid=1939, Unknown=0, NotChecked=0, Total=2162 [2021-10-03 12:29:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-10-03 12:29:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2721. [2021-10-03 12:29:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 4.243382352941176) internal successors, (11542), 2720 states have internal predecessors, (11542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 11542 transitions. [2021-10-03 12:29:29,310 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 11542 transitions. Word has length 35 [2021-10-03 12:29:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:29,311 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 11542 transitions. [2021-10-03 12:29:29,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 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) [2021-10-03 12:29:29,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 11542 transitions. [2021-10-03 12:29:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:29:29,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:29,323 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:29,372 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 [2021-10-03 12:29:29,537 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,SelfDestructingSolverStorable24 [2021-10-03 12:29:29,538 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash -507442424, now seen corresponding path program 14 times [2021-10-03 12:29:29,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:29,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986287326] [2021-10-03 12:29:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:29,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:31,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:31,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986287326] [2021-10-03 12:29:31,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986287326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:31,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689514038] [2021-10-03 12:29:31,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:29:31,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:31,400 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) [2021-10-03 12:29:31,404 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 [2021-10-03 12:29:32,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:29:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-03 12:29:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:29:32,998 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 45 treesize of output 43 [2021-10-03 12:29:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:34,220 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-03 12:29:34,221 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 54 treesize of output 63 [2021-10-03 12:29:34,372 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:29:34,373 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 43 treesize of output 45 [2021-10-03 12:29:34,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:34,695 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 45 treesize of output 35 [2021-10-03 12:29:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:29:34,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689514038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:34,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:34,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-10-03 12:29:34,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346487134] [2021-10-03 12:29:34,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-03 12:29:34,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-03 12:29:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-10-03 12:29:34,758 INFO L87 Difference]: Start difference. First operand 2721 states and 11542 transitions. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:37,741 INFO L93 Difference]: Finished difference Result 5386 states and 22701 transitions. [2021-10-03 12:29:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:29:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:29:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:37,760 INFO L225 Difference]: With dead ends: 5386 [2021-10-03 12:29:37,760 INFO L226 Difference]: Without dead ends: 5363 [2021-10-03 12:29:37,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2829.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2021-10-03 12:29:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2021-10-03 12:29:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 2621. [2021-10-03 12:29:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.2267175572519085) internal successors, (11074), 2620 states have internal predecessors, (11074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11074 transitions. [2021-10-03 12:29:37,880 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11074 transitions. Word has length 35 [2021-10-03 12:29:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 11074 transitions. [2021-10-03 12:29:37,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11074 transitions. [2021-10-03 12:29:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:29:37,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:37,889 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:37,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:38,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-03 12:29:38,104 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1104541416, now seen corresponding path program 15 times [2021-10-03 12:29:38,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:38,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210798996] [2021-10-03 12:29:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:38,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:29:40,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:40,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210798996] [2021-10-03 12:29:40,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210798996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:40,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345074138] [2021-10-03 12:29:40,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:29:40,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:40,325 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) [2021-10-03 12:29:40,326 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 [2021-10-03 12:29:41,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:29:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-03 12:29:41,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:29:43,248 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-03 12:29:43,249 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 54 treesize of output 63 [2021-10-03 12:29:43,601 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-03 12:29:43,602 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 52 [2021-10-03 12:29:43,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:29:43,731 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 45 treesize of output 35 [2021-10-03 12:29:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:29:43,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345074138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:43,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:43,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-10-03 12:29:43,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005431716] [2021-10-03 12:29:43,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:29:43,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:29:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:29:43,817 INFO L87 Difference]: Start difference. First operand 2621 states and 11074 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:47,310 INFO L93 Difference]: Finished difference Result 5186 states and 21845 transitions. [2021-10-03 12:29:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:29:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:29:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:47,329 INFO L225 Difference]: With dead ends: 5186 [2021-10-03 12:29:47,329 INFO L226 Difference]: Without dead ends: 5163 [2021-10-03 12:29:47,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3314.3ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-10-03 12:29:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2021-10-03 12:29:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 2585. [2021-10-03 12:29:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 4.234520123839009) internal successors, (10942), 2584 states have internal predecessors, (10942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 10942 transitions. [2021-10-03 12:29:47,425 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 10942 transitions. Word has length 35 [2021-10-03 12:29:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:47,426 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 10942 transitions. [2021-10-03 12:29:47,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 10942 transitions. [2021-10-03 12:29:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:29:47,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:47,435 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:47,479 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 [2021-10-03 12:29:47,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-03 12:29:47,650 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1184939052, now seen corresponding path program 16 times [2021-10-03 12:29:47,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:47,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782967364] [2021-10-03 12:29:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:47,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:49,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:49,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782967364] [2021-10-03 12:29:49,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782967364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:49,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455317169] [2021-10-03 12:29:49,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:29:49,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:49,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:49,052 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) [2021-10-03 12:29:49,056 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 [2021-10-03 12:29:50,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:29:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:50,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:29:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:52,251 INFO L354 Elim1Store]: treesize reduction 73, result has 21.5 percent of original size [2021-10-03 12:29:52,252 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 66 treesize of output 51 [2021-10-03 12:29:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:52,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455317169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:52,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:29:52,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-03 12:29:52,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898391383] [2021-10-03 12:29:52,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:29:52,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:29:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:29:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:29:52,334 INFO L87 Difference]: Start difference. First operand 2585 states and 10942 transitions. Second operand has 25 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:29:55,534 INFO L93 Difference]: Finished difference Result 3962 states and 16700 transitions. [2021-10-03 12:29:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:29:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:29:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:29:55,546 INFO L225 Difference]: With dead ends: 3962 [2021-10-03 12:29:55,546 INFO L226 Difference]: Without dead ends: 3939 [2021-10-03 12:29:55,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2913.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-10-03 12:29:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-10-03 12:29:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2626. [2021-10-03 12:29:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 4.2327619047619045) internal successors, (11111), 2625 states have internal predecessors, (11111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11111 transitions. [2021-10-03 12:29:55,611 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11111 transitions. Word has length 35 [2021-10-03 12:29:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:29:55,611 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 11111 transitions. [2021-10-03 12:29:55,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:29:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11111 transitions. [2021-10-03 12:29:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:29:55,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:29:55,618 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:29:55,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-03 12:29:55,818 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,SelfDestructingSolverStorable27 [2021-10-03 12:29:55,819 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:29:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:29:55,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1619131916, now seen corresponding path program 17 times [2021-10-03 12:29:55,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:29:55,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993467061] [2021-10-03 12:29:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:29:55,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:29:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:29:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:29:57,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:29:57,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993467061] [2021-10-03 12:29:57,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993467061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:29:57,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414604403] [2021-10-03 12:29:57,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:29:57,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:29:57,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:29:57,152 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) [2021-10-03 12:29:57,153 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 [2021-10-03 12:29:58,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:29:58,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:29:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-03 12:29:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:29:59,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-03 12:29:59,236 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 24 treesize of output 20 [2021-10-03 12:29:59,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 12:29:59,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-03 12:29:59,438 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 20 treesize of output 16 [2021-10-03 12:29:59,533 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 17 treesize of output 13 [2021-10-03 12:29:59,651 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 17 treesize of output 13 [2021-10-03 12:29:59,769 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 17 treesize of output 13 [2021-10-03 12:29:59,863 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 17 treesize of output 13 [2021-10-03 12:30:00,349 INFO L354 Elim1Store]: treesize reduction 65, result has 38.1 percent of original size [2021-10-03 12:30:00,350 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 66 treesize of output 65 [2021-10-03 12:30:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414604403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:00,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:00,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-03 12:30:00,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456838479] [2021-10-03 12:30:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:30:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:30:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:30:00,449 INFO L87 Difference]: Start difference. First operand 2626 states and 11111 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2021-10-03 12:30:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:03,298 INFO L93 Difference]: Finished difference Result 3971 states and 16712 transitions. [2021-10-03 12:30:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-03 12:30:03,299 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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 35 [2021-10-03 12:30:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:03,312 INFO L225 Difference]: With dead ends: 3971 [2021-10-03 12:30:03,312 INFO L226 Difference]: Without dead ends: 3948 [2021-10-03 12:30:03,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2585.9ms TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:30:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-10-03 12:30:03,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2626. [2021-10-03 12:30:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 4.233904761904762) internal successors, (11114), 2625 states have internal predecessors, (11114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11114 transitions. [2021-10-03 12:30:03,374 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11114 transitions. Word has length 35 [2021-10-03 12:30:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:03,374 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 11114 transitions. [2021-10-03 12:30:03,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2021-10-03 12:30:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11114 transitions. [2021-10-03 12:30:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:30:03,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:03,381 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:03,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-03 12:30:03,582 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,SelfDestructingSolverStorable28 [2021-10-03 12:30:03,586 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2107978038, now seen corresponding path program 18 times [2021-10-03 12:30:03,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:03,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054079196] [2021-10-03 12:30:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:03,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:04,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:04,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054079196] [2021-10-03 12:30:04,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054079196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:04,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300341237] [2021-10-03 12:30:04,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:30:04,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:04,949 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) [2021-10-03 12:30:04,951 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 [2021-10-03 12:30:06,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:30:06,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-03 12:30:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:06,970 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:30:06,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 80 [2021-10-03 12:30:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:30:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:07,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:07,544 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-03 12:30:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 58 treesize of output 97 [2021-10-03 12:30:07,885 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 61 treesize of output 57 [2021-10-03 12:30:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:08,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:08,521 INFO L354 Elim1Store]: treesize reduction 120, result has 37.8 percent of original size [2021-10-03 12:30:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 80 treesize of output 136 [2021-10-03 12:30:08,812 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 36 treesize of output 32 [2021-10-03 12:30:08,973 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 17 treesize of output 13 [2021-10-03 12:30:09,135 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 17 treesize of output 13 [2021-10-03 12:30:09,289 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 17 treesize of output 13 [2021-10-03 12:30:09,434 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 [2021-10-03 12:30:10,037 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-03 12:30:10,038 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 72 treesize of output 62 [2021-10-03 12:30:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:10,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300341237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:10,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:10,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-03 12:30:10,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520938687] [2021-10-03 12:30:10,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:30:10,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:30:10,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:30:10,217 INFO L87 Difference]: Start difference. First operand 2626 states and 11114 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2021-10-03 12:30:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:13,787 INFO L93 Difference]: Finished difference Result 4264 states and 17951 transitions. [2021-10-03 12:30:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:30:13,788 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 35 [2021-10-03 12:30:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:13,802 INFO L225 Difference]: With dead ends: 4264 [2021-10-03 12:30:13,802 INFO L226 Difference]: Without dead ends: 4241 [2021-10-03 12:30:13,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3603.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-10-03 12:30:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-10-03 12:30:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2659. [2021-10-03 12:30:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 4.227614747930775) internal successors, (11237), 2658 states have internal predecessors, (11237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 11237 transitions. [2021-10-03 12:30:13,888 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 11237 transitions. Word has length 35 [2021-10-03 12:30:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:13,888 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 11237 transitions. [2021-10-03 12:30:13,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2021-10-03 12:30:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 11237 transitions. [2021-10-03 12:30:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:30:13,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:13,895 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:13,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-03 12:30:14,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:14,096 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1977578306, now seen corresponding path program 19 times [2021-10-03 12:30:14,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:14,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122456474] [2021-10-03 12:30:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:14,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:15,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:15,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122456474] [2021-10-03 12:30:15,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122456474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:15,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842251102] [2021-10-03 12:30:15,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:30:15,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:15,449 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) [2021-10-03 12:30:15,450 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 [2021-10-03 12:30:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-03 12:30:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:19,308 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-03 12:30:19,309 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 58 treesize of output 42 [2021-10-03 12:30:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:19,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842251102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:19,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:19,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-03 12:30:19,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670805545] [2021-10-03 12:30:19,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-03 12:30:19,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-03 12:30:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:30:19,359 INFO L87 Difference]: Start difference. First operand 2659 states and 11237 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 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) [2021-10-03 12:30:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:21,063 INFO L93 Difference]: Finished difference Result 3819 states and 16062 transitions. [2021-10-03 12:30:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 12:30:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 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 35 [2021-10-03 12:30:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:21,074 INFO L225 Difference]: With dead ends: 3819 [2021-10-03 12:30:21,075 INFO L226 Difference]: Without dead ends: 3796 [2021-10-03 12:30:21,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1663.5ms TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 12:30:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2021-10-03 12:30:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 2857. [2021-10-03 12:30:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 4.224439775910364) internal successors, (12065), 2856 states have internal predecessors, (12065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 12065 transitions. [2021-10-03 12:30:21,136 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 12065 transitions. Word has length 35 [2021-10-03 12:30:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:21,136 INFO L470 AbstractCegarLoop]: Abstraction has 2857 states and 12065 transitions. [2021-10-03 12:30:21,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 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) [2021-10-03 12:30:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 12065 transitions. [2021-10-03 12:30:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:30:21,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:21,144 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:21,176 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 [2021-10-03 12:30:21,348 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,SelfDestructingSolverStorable30 [2021-10-03 12:30:21,348 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1034111142, now seen corresponding path program 20 times [2021-10-03 12:30:21,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:21,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692754775] [2021-10-03 12:30:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:21,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:22,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:22,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692754775] [2021-10-03 12:30:22,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692754775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:22,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135935310] [2021-10-03 12:30:22,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:30:22,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:22,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:22,715 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) [2021-10-03 12:30:22,716 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 [2021-10-03 12:30:24,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:30:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-03 12:30:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:24,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:24,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:24,891 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-03 12:30:24,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 68 [2021-10-03 12:30:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:30:25,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:25,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:25,451 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-03 12:30:25,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 58 treesize of output 97 [2021-10-03 12:30:25,772 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 61 treesize of output 57 [2021-10-03 12:30:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:26,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:30:26,361 INFO L354 Elim1Store]: treesize reduction 120, result has 37.8 percent of original size [2021-10-03 12:30:26,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 80 treesize of output 136 [2021-10-03 12:30:26,730 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 36 treesize of output 32 [2021-10-03 12:30:26,900 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 17 treesize of output 13 [2021-10-03 12:30:27,061 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 17 treesize of output 13 [2021-10-03 12:30:27,225 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 17 treesize of output 13 [2021-10-03 12:30:27,360 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 [2021-10-03 12:30:28,263 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-03 12:30:28,263 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 72 treesize of output 62 [2021-10-03 12:30:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:30:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135935310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:28,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:28,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-03 12:30:28,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352374004] [2021-10-03 12:30:28,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:30:28,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:30:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:30:28,391 INFO L87 Difference]: Start difference. First operand 2857 states and 12065 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2021-10-03 12:30:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:31,256 INFO L93 Difference]: Finished difference Result 4343 states and 18226 transitions. [2021-10-03 12:30:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 12:30:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 35 [2021-10-03 12:30:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:31,270 INFO L225 Difference]: With dead ends: 4343 [2021-10-03 12:30:31,270 INFO L226 Difference]: Without dead ends: 4320 [2021-10-03 12:30:31,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2802.8ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:30:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-10-03 12:30:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 2697. [2021-10-03 12:30:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2696 states have (on average 4.222922848664688) internal successors, (11385), 2696 states have internal predecessors, (11385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 11385 transitions. [2021-10-03 12:30:31,406 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 11385 transitions. Word has length 35 [2021-10-03 12:30:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:31,406 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 11385 transitions. [2021-10-03 12:30:31,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2021-10-03 12:30:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 11385 transitions. [2021-10-03 12:30:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:30:31,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:31,416 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:31,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-03 12:30:31,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:31,630 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash 509442134, now seen corresponding path program 21 times [2021-10-03 12:30:31,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:31,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428790903] [2021-10-03 12:30:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:31,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:33,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:33,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428790903] [2021-10-03 12:30:33,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428790903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:33,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169395698] [2021-10-03 12:30:33,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:30:33,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:33,056 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) [2021-10-03 12:30:33,057 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 [2021-10-03 12:30:35,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:30:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:30:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:35,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-03 12:30:35,518 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 24 treesize of output 20 [2021-10-03 12:30:35,659 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 12:30:35,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-03 12:30:35,772 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 20 treesize of output 16 [2021-10-03 12:30:35,862 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 17 treesize of output 13 [2021-10-03 12:30:35,999 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 17 treesize of output 13 [2021-10-03 12:30:36,132 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 17 treesize of output 13 [2021-10-03 12:30:36,238 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 17 treesize of output 13 [2021-10-03 12:30:36,846 INFO L354 Elim1Store]: treesize reduction 20, result has 81.0 percent of original size [2021-10-03 12:30:36,846 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 73 treesize of output 117 [2021-10-03 12:30:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169395698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:37,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:37,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-03 12:30:37,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15791041] [2021-10-03 12:30:37,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:30:37,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:30:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:30:37,230 INFO L87 Difference]: Start difference. First operand 2697 states and 11385 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:30:40,641 INFO L93 Difference]: Finished difference Result 5496 states and 23083 transitions. [2021-10-03 12:30:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:30:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-10-03 12:30:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:30:40,658 INFO L225 Difference]: With dead ends: 5496 [2021-10-03 12:30:40,659 INFO L226 Difference]: Without dead ends: 5473 [2021-10-03 12:30:40,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 3019.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2021-10-03 12:30:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-10-03 12:30:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 3269. [2021-10-03 12:30:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3269 states, 3268 states have (on average 4.219706242350061) internal successors, (13790), 3268 states have internal predecessors, (13790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 13790 transitions. [2021-10-03 12:30:40,741 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 13790 transitions. Word has length 35 [2021-10-03 12:30:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:30:40,741 INFO L470 AbstractCegarLoop]: Abstraction has 3269 states and 13790 transitions. [2021-10-03 12:30:40,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:30:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 13790 transitions. [2021-10-03 12:30:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:30:40,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:30:40,753 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:30:40,800 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 [2021-10-03 12:30:40,967 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,SelfDestructingSolverStorable32 [2021-10-03 12:30:40,968 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:30:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:30:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1804994682, now seen corresponding path program 22 times [2021-10-03 12:30:40,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:30:40,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148154503] [2021-10-03 12:30:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:30:40,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:30:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:30:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:30:43,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:30:43,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148154503] [2021-10-03 12:30:43,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148154503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:43,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072986089] [2021-10-03 12:30:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:30:43,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:30:43,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:30:43,205 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) [2021-10-03 12:30:43,206 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 [2021-10-03 12:30:45,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:30:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:30:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-03 12:30:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:30:45,463 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 103 treesize of output 101 [2021-10-03 12:30:46,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:30:46,683 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-10-03 12:30:46,683 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 55 treesize of output 60 [2021-10-03 12:30:47,306 INFO L354 Elim1Store]: treesize reduction 69, result has 30.3 percent of original size [2021-10-03 12:30:47,307 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 66 treesize of output 57 [2021-10-03 12:30:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:30:47,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072986089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:30:47,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:30:47,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-03 12:30:47,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925386847] [2021-10-03 12:30:47,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:30:47,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:30:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:30:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:30:47,407 INFO L87 Difference]: Start difference. First operand 3269 states and 13790 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:00,020 INFO L93 Difference]: Finished difference Result 6609 states and 28000 transitions. [2021-10-03 12:31:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-03 12:31:00,021 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:31:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:00,041 INFO L225 Difference]: With dead ends: 6609 [2021-10-03 12:31:00,041 INFO L226 Difference]: Without dead ends: 6586 [2021-10-03 12:31:00,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 11503.0ms TimeCoverageRelationStatistics Valid=731, Invalid=5431, Unknown=0, NotChecked=0, Total=6162 [2021-10-03 12:31:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-10-03 12:31:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 3399. [2021-10-03 12:31:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 4.253384343731607) internal successors, (14453), 3398 states have internal predecessors, (14453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 14453 transitions. [2021-10-03 12:31:00,177 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 14453 transitions. Word has length 35 [2021-10-03 12:31:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:00,177 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 14453 transitions. [2021-10-03 12:31:00,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 14453 transitions. [2021-10-03 12:31:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:31:00,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:00,189 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:00,233 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 [2021-10-03 12:31:00,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:00,405 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:00,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1466478110, now seen corresponding path program 23 times [2021-10-03 12:31:00,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:00,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000115159] [2021-10-03 12:31:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:00,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:02,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:02,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000115159] [2021-10-03 12:31:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000115159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:02,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245543541] [2021-10-03 12:31:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:31:02,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:02,915 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) [2021-10-03 12:31:02,916 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 [2021-10-03 12:31:05,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:31:05,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-03 12:31:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:05,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,303 INFO L354 Elim1Store]: treesize reduction 189, result has 16.4 percent of original size [2021-10-03 12:31:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2021-10-03 12:31:05,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:31:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:05,864 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-03 12:31:05,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 58 treesize of output 97 [2021-10-03 12:31:06,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-03 12:31:06,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:06,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:06,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:06,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:31:06,600 INFO L354 Elim1Store]: treesize reduction 68, result has 47.3 percent of original size [2021-10-03 12:31:06,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 60 treesize of output 104 [2021-10-03 12:31:06,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-03 12:31:07,023 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 426 treesize of output 422 [2021-10-03 12:31:08,424 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 246 treesize of output 242 [2021-10-03 12:31:09,477 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 185 treesize of output 181 [2021-10-03 12:31:10,950 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-10-03 12:31:10,951 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 5 case distinctions, treesize of input 112 treesize of output 117 [2021-10-03 12:31:11,642 INFO L354 Elim1Store]: treesize reduction 81, result has 12.9 percent of original size [2021-10-03 12:31:11,643 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 77 treesize of output 52 [2021-10-03 12:31:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245543541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:11,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:11,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-03 12:31:11,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510289830] [2021-10-03 12:31:11,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-03 12:31:11,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:11,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-03 12:31:11,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:31:11,739 INFO L87 Difference]: Start difference. First operand 3399 states and 14453 transitions. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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) [2021-10-03 12:31:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:18,924 INFO L93 Difference]: Finished difference Result 5308 states and 22446 transitions. [2021-10-03 12:31:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:31:18,925 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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 35 [2021-10-03 12:31:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:18,940 INFO L225 Difference]: With dead ends: 5308 [2021-10-03 12:31:18,940 INFO L226 Difference]: Without dead ends: 5285 [2021-10-03 12:31:18,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 6785.0ms TimeCoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2021-10-03 12:31:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-10-03 12:31:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 3498. [2021-10-03 12:31:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 4.2556476980268805) internal successors, (14882), 3497 states have internal predecessors, (14882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 14882 transitions. [2021-10-03 12:31:19,024 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 14882 transitions. Word has length 35 [2021-10-03 12:31:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 14882 transitions. [2021-10-03 12:31:19,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 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) [2021-10-03 12:31:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 14882 transitions. [2021-10-03 12:31:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:31:19,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:19,033 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:19,065 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 [2021-10-03 12:31:19,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-03 12:31:19,237 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:19,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1227485964, now seen corresponding path program 24 times [2021-10-03 12:31:19,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:19,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772534507] [2021-10-03 12:31:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:19,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:20,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:20,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772534507] [2021-10-03 12:31:20,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772534507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:20,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125374043] [2021-10-03 12:31:20,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:31:20,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:20,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:20,723 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) [2021-10-03 12:31:20,725 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 [2021-10-03 12:31:23,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:31:23,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:31:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:24,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:31:24,726 INFO L354 Elim1Store]: treesize reduction 112, result has 29.1 percent of original size [2021-10-03 12:31:24,726 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 62 treesize of output 75 [2021-10-03 12:31:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:24,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125374043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:24,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:24,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-03 12:31:24,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590077528] [2021-10-03 12:31:24,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:31:24,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:31:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:31:24,995 INFO L87 Difference]: Start difference. First operand 3498 states and 14882 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:27,297 INFO L93 Difference]: Finished difference Result 5339 states and 22560 transitions. [2021-10-03 12:31:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:31:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:31:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:27,313 INFO L225 Difference]: With dead ends: 5339 [2021-10-03 12:31:27,313 INFO L226 Difference]: Without dead ends: 5316 [2021-10-03 12:31:27,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1966.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-10-03 12:31:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2021-10-03 12:31:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 3471. [2021-10-03 12:31:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 4.253890489913545) internal successors, (14761), 3470 states have internal predecessors, (14761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 14761 transitions. [2021-10-03 12:31:27,396 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 14761 transitions. Word has length 35 [2021-10-03 12:31:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:27,396 INFO L470 AbstractCegarLoop]: Abstraction has 3471 states and 14761 transitions. [2021-10-03 12:31:27,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 14761 transitions. [2021-10-03 12:31:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:31:27,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:27,404 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:27,437 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 [2021-10-03 12:31:27,604 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,SelfDestructingSolverStorable35 [2021-10-03 12:31:27,605 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:27,606 INFO L82 PathProgramCache]: Analyzing trace with hash 156681448, now seen corresponding path program 25 times [2021-10-03 12:31:27,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:27,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604765020] [2021-10-03 12:31:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:27,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:30,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:30,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604765020] [2021-10-03 12:31:30,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604765020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:30,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715816992] [2021-10-03 12:31:30,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:31:30,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:30,318 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) [2021-10-03 12:31:30,320 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 [2021-10-03 12:31:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:32,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-03 12:31:32,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:32,839 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 47 treesize of output 45 [2021-10-03 12:31:33,588 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 12:31:33,589 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 [2021-10-03 12:31:33,991 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-03 12:31:33,991 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 56 treesize of output 46 [2021-10-03 12:31:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:31:34,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715816992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:34,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:34,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-10-03 12:31:34,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818749681] [2021-10-03 12:31:34,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:31:34,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:31:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:31:34,103 INFO L87 Difference]: Start difference. First operand 3471 states and 14761 transitions. Second operand has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 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) [2021-10-03 12:31:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:39,204 INFO L93 Difference]: Finished difference Result 4619 states and 19473 transitions. [2021-10-03 12:31:39,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:31:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 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 35 [2021-10-03 12:31:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:39,218 INFO L225 Difference]: With dead ends: 4619 [2021-10-03 12:31:39,219 INFO L226 Difference]: Without dead ends: 4596 [2021-10-03 12:31:39,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3201.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:31:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-10-03 12:31:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3467. [2021-10-03 12:31:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 4.254183496826313) internal successors, (14745), 3466 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 14745 transitions. [2021-10-03 12:31:39,298 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 14745 transitions. Word has length 35 [2021-10-03 12:31:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:39,298 INFO L470 AbstractCegarLoop]: Abstraction has 3467 states and 14745 transitions. [2021-10-03 12:31:39,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 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) [2021-10-03 12:31:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 14745 transitions. [2021-10-03 12:31:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:31:39,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:39,309 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:39,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-03 12:31:39,522 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,SelfDestructingSolverStorable36 [2021-10-03 12:31:39,523 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash 152960514, now seen corresponding path program 26 times [2021-10-03 12:31:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:39,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982118949] [2021-10-03 12:31:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:39,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:41,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:41,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982118949] [2021-10-03 12:31:41,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982118949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:41,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035844591] [2021-10-03 12:31:41,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:31:41,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:41,672 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) [2021-10-03 12:31:41,673 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 [2021-10-03 12:31:44,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:31:44,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:44,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-03 12:31:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:45,980 INFO L354 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2021-10-03 12:31:45,981 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 89 [2021-10-03 12:31:46,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:31:46,161 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 37 treesize of output 37 [2021-10-03 12:31:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:46,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035844591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:46,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:46,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-10-03 12:31:46,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661393923] [2021-10-03 12:31:46,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:31:46,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:46,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:31:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:31:46,359 INFO L87 Difference]: Start difference. First operand 3467 states and 14745 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:31:50,421 INFO L93 Difference]: Finished difference Result 6085 states and 25741 transitions. [2021-10-03 12:31:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:31:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:31:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:31:50,440 INFO L225 Difference]: With dead ends: 6085 [2021-10-03 12:31:50,440 INFO L226 Difference]: Without dead ends: 6062 [2021-10-03 12:31:50,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3496.5ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-10-03 12:31:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6062 states. [2021-10-03 12:31:50,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6062 to 3472. [2021-10-03 12:31:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 4.253529242293287) internal successors, (14764), 3471 states have internal predecessors, (14764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 14764 transitions. [2021-10-03 12:31:50,531 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 14764 transitions. Word has length 35 [2021-10-03 12:31:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:31:50,532 INFO L470 AbstractCegarLoop]: Abstraction has 3472 states and 14764 transitions. [2021-10-03 12:31:50,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:31:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 14764 transitions. [2021-10-03 12:31:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:31:50,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:31:50,539 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:31:50,576 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 [2021-10-03 12:31:50,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-03 12:31:50,741 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:31:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:31:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash -698331048, now seen corresponding path program 27 times [2021-10-03 12:31:50,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:31:50,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207125077] [2021-10-03 12:31:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:31:50,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:31:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:31:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:31:53,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:31:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207125077] [2021-10-03 12:31:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207125077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031433196] [2021-10-03 12:31:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:31:53,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:31:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:31:53,387 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) [2021-10-03 12:31:53,388 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 [2021-10-03 12:31:56,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:31:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:31:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:31:56,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:31:57,417 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-03 12:31:57,418 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 45 treesize of output 51 [2021-10-03 12:31:57,643 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-03 12:31:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2021-10-03 12:31:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:31:57,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031433196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:31:57,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:31:57,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 28 [2021-10-03 12:31:57,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924397169] [2021-10-03 12:31:57,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-03 12:31:57,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:31:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-03 12:31:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:31:57,803 INFO L87 Difference]: Start difference. First operand 3472 states and 14764 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-10-03 12:32:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:01,186 INFO L93 Difference]: Finished difference Result 4877 states and 20544 transitions. [2021-10-03 12:32:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:32:01,186 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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 35 [2021-10-03 12:32:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:01,200 INFO L225 Difference]: With dead ends: 4877 [2021-10-03 12:32:01,200 INFO L226 Difference]: Without dead ends: 4854 [2021-10-03 12:32:01,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 3388.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:32:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-10-03 12:32:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 3471. [2021-10-03 12:32:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 4.253602305475504) internal successors, (14760), 3470 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 14760 transitions. [2021-10-03 12:32:01,289 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 14760 transitions. Word has length 35 [2021-10-03 12:32:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:01,289 INFO L470 AbstractCegarLoop]: Abstraction has 3471 states and 14760 transitions. [2021-10-03 12:32:01,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-10-03 12:32:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 14760 transitions. [2021-10-03 12:32:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:32:01,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:01,300 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:01,342 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 [2021-10-03 12:32:01,514 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,SelfDestructingSolverStorable38 [2021-10-03 12:32:01,515 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1241978442, now seen corresponding path program 28 times [2021-10-03 12:32:01,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:01,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638663559] [2021-10-03 12:32:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:01,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:04,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:04,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638663559] [2021-10-03 12:32:04,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638663559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:04,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075301948] [2021-10-03 12:32:04,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:32:04,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:04,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:04,164 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) [2021-10-03 12:32:04,171 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 [2021-10-03 12:32:06,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:32:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:32:06,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-03 12:32:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:07,018 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 69 treesize of output 67 [2021-10-03 12:32:07,928 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 11 treesize of output 7 [2021-10-03 12:32:08,078 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 26 treesize of output 22 [2021-10-03 12:32:08,418 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 26 treesize of output 22 [2021-10-03 12:32:08,648 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 26 treesize of output 22 [2021-10-03 12:32:09,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:32:09,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:32:09,501 INFO L354 Elim1Store]: treesize reduction 123, result has 20.1 percent of original size [2021-10-03 12:32:09,501 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 59 treesize of output 60 [2021-10-03 12:32:10,662 INFO L354 Elim1Store]: treesize reduction 73, result has 21.5 percent of original size [2021-10-03 12:32:10,662 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 68 treesize of output 53 [2021-10-03 12:32:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:10,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075301948] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:10,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:10,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-10-03 12:32:10,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885010274] [2021-10-03 12:32:10,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-03 12:32:10,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-03 12:32:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 12:32:10,728 INFO L87 Difference]: Start difference. First operand 3471 states and 14760 transitions. Second operand has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2021-10-03 12:32:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:25,594 INFO L93 Difference]: Finished difference Result 5508 states and 23254 transitions. [2021-10-03 12:32:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:32:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 35 [2021-10-03 12:32:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:25,613 INFO L225 Difference]: With dead ends: 5508 [2021-10-03 12:32:25,614 INFO L226 Difference]: Without dead ends: 5485 [2021-10-03 12:32:25,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 4965.0ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-10-03 12:32:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5485 states. [2021-10-03 12:32:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5485 to 3768. [2021-10-03 12:32:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3768 states, 3767 states have (on average 4.243960711441465) internal successors, (15987), 3767 states have internal predecessors, (15987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 15987 transitions. [2021-10-03 12:32:25,700 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 15987 transitions. Word has length 35 [2021-10-03 12:32:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:25,700 INFO L470 AbstractCegarLoop]: Abstraction has 3768 states and 15987 transitions. [2021-10-03 12:32:25,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2021-10-03 12:32:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 15987 transitions. [2021-10-03 12:32:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:32:25,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:25,708 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:25,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-03 12:32:25,909 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,SelfDestructingSolverStorable39 [2021-10-03 12:32:25,910 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:25,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:25,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1431171270, now seen corresponding path program 29 times [2021-10-03 12:32:25,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:25,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166556146] [2021-10-03 12:32:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:25,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:32:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:27,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166556146] [2021-10-03 12:32:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166556146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:27,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672671809] [2021-10-03 12:32:27,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:32:27,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:27,634 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) [2021-10-03 12:32:27,634 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 [2021-10-03 12:32:30,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-03 12:32:30,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:32:30,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-03 12:32:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:30,482 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 134 treesize of output 126 [2021-10-03 12:32:30,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-03 12:32:30,935 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 24 treesize of output 20 [2021-10-03 12:32:31,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 12:32:31,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-03 12:32:31,253 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 20 treesize of output 16 [2021-10-03 12:32:31,392 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 21 treesize of output 17 [2021-10-03 12:32:31,593 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 21 treesize of output 17 [2021-10-03 12:32:31,788 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 21 treesize of output 17 [2021-10-03 12:32:32,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:32:32,465 INFO L354 Elim1Store]: treesize reduction 137, result has 22.2 percent of original size [2021-10-03 12:32:32,465 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 54 treesize of output 63 [2021-10-03 12:32:33,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:32:33,022 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 54 treesize of output 79 [2021-10-03 12:32:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:33,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672671809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:33,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:33,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-10-03 12:32:33,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452498250] [2021-10-03 12:32:33,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-03 12:32:33,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-03 12:32:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-10-03 12:32:33,180 INFO L87 Difference]: Start difference. First operand 3768 states and 15987 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-10-03 12:32:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:36,678 INFO L93 Difference]: Finished difference Result 6987 states and 29453 transitions. [2021-10-03 12:32:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:32:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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 35 [2021-10-03 12:32:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:36,699 INFO L225 Difference]: With dead ends: 6987 [2021-10-03 12:32:36,699 INFO L226 Difference]: Without dead ends: 6947 [2021-10-03 12:32:36,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 3285.2ms TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-10-03 12:32:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6947 states. [2021-10-03 12:32:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6947 to 3806. [2021-10-03 12:32:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 4.244678055190539) internal successors, (16151), 3805 states have internal predecessors, (16151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 16151 transitions. [2021-10-03 12:32:36,821 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 16151 transitions. Word has length 35 [2021-10-03 12:32:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:36,821 INFO L470 AbstractCegarLoop]: Abstraction has 3806 states and 16151 transitions. [2021-10-03 12:32:36,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-10-03 12:32:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 16151 transitions. [2021-10-03 12:32:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:32:36,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:36,830 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:36,867 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 [2021-10-03 12:32:37,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:37,033 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash 87714488, now seen corresponding path program 30 times [2021-10-03 12:32:37,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:37,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879129449] [2021-10-03 12:32:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:37,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:32:38,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:38,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879129449] [2021-10-03 12:32:38,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879129449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:38,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426786641] [2021-10-03 12:32:38,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:32:38,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:38,798 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) [2021-10-03 12:32:38,799 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 [2021-10-03 12:32:41,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-03 12:32:41,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:32:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-03 12:32:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:42,638 INFO L354 Elim1Store]: treesize reduction 128, result has 28.1 percent of original size [2021-10-03 12:32:42,639 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 60 treesize of output 73 [2021-10-03 12:32:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:32:42,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426786641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:42,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:42,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2021-10-03 12:32:42,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913678103] [2021-10-03 12:32:42,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:32:42,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:42,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:32:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:32:42,780 INFO L87 Difference]: Start difference. First operand 3806 states and 16151 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:32:45,116 INFO L93 Difference]: Finished difference Result 6499 states and 27440 transitions. [2021-10-03 12:32:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:32:45,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:32:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:32:45,138 INFO L225 Difference]: With dead ends: 6499 [2021-10-03 12:32:45,139 INFO L226 Difference]: Without dead ends: 6476 [2021-10-03 12:32:45,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2018.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:32:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-10-03 12:32:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 3764. [2021-10-03 12:32:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 4.242625564709009) internal successors, (15965), 3763 states have internal predecessors, (15965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 15965 transitions. [2021-10-03 12:32:45,264 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 15965 transitions. Word has length 35 [2021-10-03 12:32:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:32:45,264 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 15965 transitions. [2021-10-03 12:32:45,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:32:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 15965 transitions. [2021-10-03 12:32:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:32:45,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:32:45,273 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:32:45,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-03 12:32:45,474 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,SelfDestructingSolverStorable41 [2021-10-03 12:32:45,474 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:32:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:32:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash 993770884, now seen corresponding path program 31 times [2021-10-03 12:32:45,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:32:45,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221645960] [2021-10-03 12:32:45,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:32:45,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:32:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:32:49,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:32:49,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221645960] [2021-10-03 12:32:49,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221645960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:49,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895110593] [2021-10-03 12:32:49,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:32:49,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:32:49,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:32:49,505 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) [2021-10-03 12:32:49,506 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 [2021-10-03 12:32:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:32:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-03 12:32:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:32:52,488 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 336 treesize of output 304 [2021-10-03 12:32:53,526 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:32:53,527 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 36 treesize of output 38 [2021-10-03 12:32:54,090 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-03 12:32:54,091 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 56 treesize of output 46 [2021-10-03 12:32:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:32:54,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895110593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:32:54,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:32:54,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 27 [2021-10-03 12:32:54,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230266460] [2021-10-03 12:32:54,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:32:54,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:32:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:32:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:32:54,167 INFO L87 Difference]: Start difference. First operand 3764 states and 15965 transitions. Second operand has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:00,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:00,145 INFO L93 Difference]: Finished difference Result 5979 states and 25144 transitions. [2021-10-03 12:33:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:33:00,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:33:00,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:00,165 INFO L225 Difference]: With dead ends: 5979 [2021-10-03 12:33:00,165 INFO L226 Difference]: Without dead ends: 5956 [2021-10-03 12:33:00,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4216.7ms TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2021-10-03 12:33:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2021-10-03 12:33:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 3625. [2021-10-03 12:33:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.237858719646799) internal successors, (15358), 3624 states have internal predecessors, (15358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15358 transitions. [2021-10-03 12:33:00,251 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15358 transitions. Word has length 35 [2021-10-03 12:33:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:00,251 INFO L470 AbstractCegarLoop]: Abstraction has 3625 states and 15358 transitions. [2021-10-03 12:33:00,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15358 transitions. [2021-10-03 12:33:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:00,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:00,261 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:00,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-03 12:33:00,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:00,463 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash -86320218, now seen corresponding path program 32 times [2021-10-03 12:33:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:00,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700063333] [2021-10-03 12:33:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:00,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:03,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700063333] [2021-10-03 12:33:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700063333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:03,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782996829] [2021-10-03 12:33:03,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:33:03,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:03,150 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:03,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-03 12:33:06,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:33:06,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:06,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-03 12:33:06,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:06,257 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 150 treesize of output 142 [2021-10-03 12:33:07,449 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:33:07,449 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 36 treesize of output 38 [2021-10-03 12:33:08,037 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-03 12:33:08,037 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 52 [2021-10-03 12:33:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:33:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782996829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:08,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:08,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-10-03 12:33:08,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614931943] [2021-10-03 12:33:08,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:33:08,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:33:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:33:08,124 INFO L87 Difference]: Start difference. First operand 3625 states and 15358 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-10-03 12:33:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:11,332 INFO L93 Difference]: Finished difference Result 5184 states and 21830 transitions. [2021-10-03 12:33:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:33:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 [2021-10-03 12:33:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:11,348 INFO L225 Difference]: With dead ends: 5184 [2021-10-03 12:33:11,348 INFO L226 Difference]: Without dead ends: 5161 [2021-10-03 12:33:11,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3329.3ms TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2021-10-03 12:33:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-10-03 12:33:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3635. [2021-10-03 12:33:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3634 states have (on average 4.239955971381398) internal successors, (15408), 3634 states have internal predecessors, (15408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 15408 transitions. [2021-10-03 12:33:11,430 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 15408 transitions. Word has length 35 [2021-10-03 12:33:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:11,430 INFO L470 AbstractCegarLoop]: Abstraction has 3635 states and 15408 transitions. [2021-10-03 12:33:11,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-10-03 12:33:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 15408 transitions. [2021-10-03 12:33:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:11,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:11,439 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:11,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:11,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-03 12:33:11,640 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash 627273854, now seen corresponding path program 33 times [2021-10-03 12:33:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:11,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917824671] [2021-10-03 12:33:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:11,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:33:13,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:13,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917824671] [2021-10-03 12:33:13,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917824671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:13,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844428817] [2021-10-03 12:33:13,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:33:13,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:13,436 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:13,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-03 12:33:16,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:33:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-03 12:33:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-03 12:33:16,839 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 24 treesize of output 20 [2021-10-03 12:33:16,962 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 12:33:16,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-03 12:33:17,067 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 20 treesize of output 16 [2021-10-03 12:33:17,213 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 17 treesize of output 13 [2021-10-03 12:33:17,366 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 17 treesize of output 13 [2021-10-03 12:33:17,504 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 17 treesize of output 13 [2021-10-03 12:33:18,251 INFO L354 Elim1Store]: treesize reduction 128, result has 28.1 percent of original size [2021-10-03 12:33:18,252 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 74 treesize of output 87 [2021-10-03 12:33:18,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:33:18,388 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 41 treesize of output 41 [2021-10-03 12:33:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:33:18,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844428817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:18,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:18,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-03 12:33:18,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315171267] [2021-10-03 12:33:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:33:18,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:33:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-10-03 12:33:18,561 INFO L87 Difference]: Start difference. First operand 3635 states and 15408 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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) [2021-10-03 12:33:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:24,576 INFO L93 Difference]: Finished difference Result 7112 states and 30015 transitions. [2021-10-03 12:33:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-03 12:33:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 [2021-10-03 12:33:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:24,598 INFO L225 Difference]: With dead ends: 7112 [2021-10-03 12:33:24,598 INFO L226 Difference]: Without dead ends: 7089 [2021-10-03 12:33:24,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 3493.2ms TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2021-10-03 12:33:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2021-10-03 12:33:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 3640. [2021-10-03 12:33:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.239351470184117) internal successors, (15427), 3639 states have internal predecessors, (15427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15427 transitions. [2021-10-03 12:33:24,749 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15427 transitions. Word has length 35 [2021-10-03 12:33:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 3640 states and 15427 transitions. [2021-10-03 12:33:24,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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) [2021-10-03 12:33:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15427 transitions. [2021-10-03 12:33:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:24,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:24,759 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:24,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-03 12:33:24,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:24,973 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:24,974 INFO L82 PathProgramCache]: Analyzing trace with hash 738360168, now seen corresponding path program 34 times [2021-10-03 12:33:24,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:24,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605598816] [2021-10-03 12:33:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:24,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:28,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:28,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605598816] [2021-10-03 12:33:28,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605598816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:28,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191866743] [2021-10-03 12:33:28,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:33:28,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:28,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:28,417 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:28,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-03 12:33:31,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:33:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-03 12:33:31,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:32,357 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 11 treesize of output 7 [2021-10-03 12:33:32,563 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 17 treesize of output 13 [2021-10-03 12:33:32,763 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 17 treesize of output 13 [2021-10-03 12:33:32,940 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 17 treesize of output 13 [2021-10-03 12:33:33,753 INFO L354 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2021-10-03 12:33:33,753 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 45 treesize of output 45 [2021-10-03 12:33:34,093 INFO L354 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2021-10-03 12:33:34,093 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 52 treesize of output 76 [2021-10-03 12:33:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:34,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191866743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:34,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:34,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-10-03 12:33:34,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787591890] [2021-10-03 12:33:34,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-03 12:33:34,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-03 12:33:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:33:34,580 INFO L87 Difference]: Start difference. First operand 3640 states and 15427 transitions. Second operand has 35 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:41,810 INFO L93 Difference]: Finished difference Result 6601 states and 26611 transitions. [2021-10-03 12:33:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-03 12:33:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:33:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:41,829 INFO L225 Difference]: With dead ends: 6601 [2021-10-03 12:33:41,830 INFO L226 Difference]: Without dead ends: 6557 [2021-10-03 12:33:41,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 6211.0ms TimeCoverageRelationStatistics Valid=345, Invalid=3687, Unknown=0, NotChecked=0, Total=4032 [2021-10-03 12:33:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6557 states. [2021-10-03 12:33:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6557 to 4366. [2021-10-03 12:33:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4366 states, 4365 states have (on average 4.175486827033219) internal successors, (18226), 4365 states have internal predecessors, (18226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4366 states to 4366 states and 18226 transitions. [2021-10-03 12:33:41,938 INFO L78 Accepts]: Start accepts. Automaton has 4366 states and 18226 transitions. Word has length 35 [2021-10-03 12:33:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:41,938 INFO L470 AbstractCegarLoop]: Abstraction has 4366 states and 18226 transitions. [2021-10-03 12:33:41,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4366 states and 18226 transitions. [2021-10-03 12:33:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:41,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:41,947 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:41,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:42,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-03 12:33:42,149 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash 668250132, now seen corresponding path program 35 times [2021-10-03 12:33:42,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:42,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690190573] [2021-10-03 12:33:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:42,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:33:43,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:43,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690190573] [2021-10-03 12:33:43,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690190573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:43,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493751772] [2021-10-03 12:33:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:33:43,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:43,913 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:43,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-03 12:33:47,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:33:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-03 12:33:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:47,945 INFO L354 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2021-10-03 12:33:47,945 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 43 treesize of output 49 [2021-10-03 12:33:48,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:33:48,104 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 35 treesize of output 27 [2021-10-03 12:33:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 12:33:48,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493751772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:48,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:48,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 20 [2021-10-03 12:33:48,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059612433] [2021-10-03 12:33:48,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 12:33:48,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 12:33:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:33:48,184 INFO L87 Difference]: Start difference. First operand 4366 states and 18226 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-10-03 12:33:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:33:49,846 INFO L93 Difference]: Finished difference Result 6523 states and 27123 transitions. [2021-10-03 12:33:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:33:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 35 [2021-10-03 12:33:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:33:49,865 INFO L225 Difference]: With dead ends: 6523 [2021-10-03 12:33:49,865 INFO L226 Difference]: Without dead ends: 6500 [2021-10-03 12:33:49,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1700.8ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:33:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2021-10-03 12:33:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 4332. [2021-10-03 12:33:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4332 states, 4331 states have (on average 4.181482336642808) internal successors, (18110), 4331 states have internal predecessors, (18110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:33:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4332 states to 4332 states and 18110 transitions. [2021-10-03 12:33:49,980 INFO L78 Accepts]: Start accepts. Automaton has 4332 states and 18110 transitions. Word has length 35 [2021-10-03 12:33:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:33:49,980 INFO L470 AbstractCegarLoop]: Abstraction has 4332 states and 18110 transitions. [2021-10-03 12:33:49,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-10-03 12:33:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4332 states and 18110 transitions. [2021-10-03 12:33:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:33:49,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:33:49,992 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:33:50,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-03 12:33:50,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:50,206 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:33:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:33:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash -794258592, now seen corresponding path program 36 times [2021-10-03 12:33:50,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:33:50,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339690112] [2021-10-03 12:33:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:33:50,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:33:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:33:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:33:52,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:33:52,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339690112] [2021-10-03 12:33:52,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339690112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:52,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127827757] [2021-10-03 12:33:52,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:33:52,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:33:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:33:52,161 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:33:52,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-03 12:33:55,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:33:55,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:33:55,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-03 12:33:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:33:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:55,642 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-03 12:33:55,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 59 [2021-10-03 12:33:55,858 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 24 treesize of output 20 [2021-10-03 12:33:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,257 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-03 12:33:56,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 81 [2021-10-03 12:33:56,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-03 12:33:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:33:57,105 INFO L354 Elim1Store]: treesize reduction 80, result has 47.7 percent of original size [2021-10-03 12:33:57,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 116 [2021-10-03 12:33:57,375 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 40 treesize of output 36 [2021-10-03 12:33:57,550 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 22 treesize of output 18 [2021-10-03 12:33:57,775 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 22 treesize of output 18 [2021-10-03 12:33:58,610 INFO L354 Elim1Store]: treesize reduction 120, result has 24.1 percent of original size [2021-10-03 12:33:58,611 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 5 case distinctions, treesize of input 63 treesize of output 72 [2021-10-03 12:33:58,835 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-03 12:33:58,836 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 52 treesize of output 54 [2021-10-03 12:33:59,846 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-03 12:33:59,847 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 33 [2021-10-03 12:33:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:33:59,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127827757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:33:59,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:33:59,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-03 12:33:59,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730014404] [2021-10-03 12:33:59,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:33:59,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:33:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:33:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:33:59,898 INFO L87 Difference]: Start difference. First operand 4332 states and 18110 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2021-10-03 12:34:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:34:03,748 INFO L93 Difference]: Finished difference Result 6002 states and 25136 transitions. [2021-10-03 12:34:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:34:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 35 [2021-10-03 12:34:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:34:03,767 INFO L225 Difference]: With dead ends: 6002 [2021-10-03 12:34:03,767 INFO L226 Difference]: Without dead ends: 5979 [2021-10-03 12:34:03,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 3871.3ms TimeCoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:34:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-10-03 12:34:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 4546. [2021-10-03 12:34:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 4.174477447744774) internal successors, (18973), 4545 states have internal predecessors, (18973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 18973 transitions. [2021-10-03 12:34:03,874 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 18973 transitions. Word has length 35 [2021-10-03 12:34:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:34:03,874 INFO L470 AbstractCegarLoop]: Abstraction has 4546 states and 18973 transitions. [2021-10-03 12:34:03,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2021-10-03 12:34:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 18973 transitions. [2021-10-03 12:34:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:34:03,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:34:03,884 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:34:03,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-03 12:34:04,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:04,100 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:34:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:34:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1193396768, now seen corresponding path program 37 times [2021-10-03 12:34:04,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:34:04,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016880614] [2021-10-03 12:34:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:34:04,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:34:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:34:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:34:06,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:34:06,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016880614] [2021-10-03 12:34:06,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016880614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413141549] [2021-10-03 12:34:06,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:34:06,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:34:06,021 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:34:06,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-03 12:34:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:34:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-03 12:34:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:34:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:34:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:34:09,511 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 59 treesize of output 55 [2021-10-03 12:34:11,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:34:11,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:34:11,075 INFO L354 Elim1Store]: treesize reduction 112, result has 25.3 percent of original size [2021-10-03 12:34:11,075 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 54 treesize of output 63 [2021-10-03 12:34:11,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:34:11,285 INFO L354 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2021-10-03 12:34:11,285 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 43 treesize of output 45 [2021-10-03 12:34:11,856 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-10-03 12:34:11,857 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 57 treesize of output 41 [2021-10-03 12:34:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:34:11,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413141549] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:11,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:34:11,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-03 12:34:11,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498580013] [2021-10-03 12:34:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:34:11,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:34:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:34:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:34:11,966 INFO L87 Difference]: Start difference. First operand 4546 states and 18973 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2021-10-03 12:34:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:34:14,004 INFO L93 Difference]: Finished difference Result 7005 states and 29245 transitions. [2021-10-03 12:34:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 12:34:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 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 35 [2021-10-03 12:34:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:34:14,029 INFO L225 Difference]: With dead ends: 7005 [2021-10-03 12:34:14,029 INFO L226 Difference]: Without dead ends: 6982 [2021-10-03 12:34:14,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1824.9ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:34:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-10-03 12:34:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 4386. [2021-10-03 12:34:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 4.171721778791334) internal successors, (18293), 4385 states have internal predecessors, (18293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 18293 transitions. [2021-10-03 12:34:14,165 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 18293 transitions. Word has length 35 [2021-10-03 12:34:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:34:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 18293 transitions. [2021-10-03 12:34:14,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2021-10-03 12:34:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 18293 transitions. [2021-10-03 12:34:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:34:14,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:34:14,176 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:34:14,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-03 12:34:14,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-03 12:34:14,377 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:34:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:34:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1489586688, now seen corresponding path program 38 times [2021-10-03 12:34:14,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:34:14,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848548292] [2021-10-03 12:34:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:34:14,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:34:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:34:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:34:17,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:34:17,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848548292] [2021-10-03 12:34:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848548292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:17,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055792731] [2021-10-03 12:34:17,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:34:17,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:17,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:34:17,123 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:34:17,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-03 12:34:20,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:34:20,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:34:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-03 12:34:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:34:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:34:22,092 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-03 12:34:22,092 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 54 treesize of output 63 [2021-10-03 12:34:22,463 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-03 12:34:22,464 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 52 [2021-10-03 12:34:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:34:22,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055792731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:22,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:34:22,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-10-03 12:34:22,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028670911] [2021-10-03 12:34:22,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:34:22,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:34:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:34:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:34:22,674 INFO L87 Difference]: Start difference. First operand 4386 states and 18293 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:34:28,007 INFO L93 Difference]: Finished difference Result 10324 states and 43342 transitions. [2021-10-03 12:34:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-03 12:34:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:34:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:34:28,045 INFO L225 Difference]: With dead ends: 10324 [2021-10-03 12:34:28,045 INFO L226 Difference]: Without dead ends: 10278 [2021-10-03 12:34:28,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4635.8ms TimeCoverageRelationStatistics Valid=233, Invalid=2023, Unknown=0, NotChecked=0, Total=2256 [2021-10-03 12:34:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-10-03 12:34:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 4342. [2021-10-03 12:34:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 4.178530292559318) internal successors, (18139), 4341 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 18139 transitions. [2021-10-03 12:34:28,263 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 18139 transitions. Word has length 35 [2021-10-03 12:34:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:34:28,264 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 18139 transitions. [2021-10-03 12:34:28,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 18139 transitions. [2021-10-03 12:34:28,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:34:28,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:34:28,273 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:34:28,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-03 12:34:28,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-03 12:34:28,474 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:34:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:34:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2047073012, now seen corresponding path program 39 times [2021-10-03 12:34:28,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:34:28,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918336470] [2021-10-03 12:34:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:34:28,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:34:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:34:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:34:30,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:34:30,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918336470] [2021-10-03 12:34:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918336470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:30,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103040558] [2021-10-03 12:34:30,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:34:30,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:30,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:34:30,265 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:34:30,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-03 12:34:33,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:34:33,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:34:33,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-03 12:34:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:34:34,641 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 11 treesize of output 7 [2021-10-03 12:34:34,836 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 [2021-10-03 12:34:35,130 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 [2021-10-03 12:34:35,603 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:34:35,604 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 42 treesize of output 44 [2021-10-03 12:34:36,052 INFO L354 Elim1Store]: treesize reduction 148, result has 16.9 percent of original size [2021-10-03 12:34:36,052 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 59 treesize of output 60 [2021-10-03 12:34:36,916 INFO L354 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2021-10-03 12:34:36,916 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 66 treesize of output 62 [2021-10-03 12:34:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:34:36,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103040558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:36,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:34:36,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-03 12:34:36,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786539795] [2021-10-03 12:34:36,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:34:36,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:34:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:34:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:34:36,984 INFO L87 Difference]: Start difference. First operand 4342 states and 18139 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2021-10-03 12:34:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:34:40,465 INFO L93 Difference]: Finished difference Result 6365 states and 26624 transitions. [2021-10-03 12:34:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:34:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 35 [2021-10-03 12:34:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:34:40,488 INFO L225 Difference]: With dead ends: 6365 [2021-10-03 12:34:40,488 INFO L226 Difference]: Without dead ends: 6342 [2021-10-03 12:34:40,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 3799.6ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-10-03 12:34:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2021-10-03 12:34:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 4632. [2021-10-03 12:34:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 4.17037356942345) internal successors, (19313), 4631 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 19313 transitions. [2021-10-03 12:34:40,594 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 19313 transitions. Word has length 35 [2021-10-03 12:34:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:34:40,594 INFO L470 AbstractCegarLoop]: Abstraction has 4632 states and 19313 transitions. [2021-10-03 12:34:40,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2021-10-03 12:34:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 19313 transitions. [2021-10-03 12:34:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:34:40,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:34:40,605 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:34:40,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-03 12:34:40,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:40,806 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:34:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:34:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -59417652, now seen corresponding path program 40 times [2021-10-03 12:34:40,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:34:40,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238165892] [2021-10-03 12:34:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:34:40,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:34:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:34:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:34:44,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:34:44,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238165892] [2021-10-03 12:34:44,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238165892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:44,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661879464] [2021-10-03 12:34:44,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:34:44,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:44,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:34:44,512 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:34:44,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-03 12:34:48,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:34:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:34:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-03 12:34:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:34:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:34:48,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:34:48,330 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 92 treesize of output 88 [2021-10-03 12:34:49,465 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:34:49,466 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 42 treesize of output 44 [2021-10-03 12:34:49,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:34:49,964 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-10-03 12:34:49,965 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 60 treesize of output 61 [2021-10-03 12:34:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:34:50,694 INFO L354 Elim1Store]: treesize reduction 31, result has 65.9 percent of original size [2021-10-03 12:34:50,694 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 60 treesize of output 81 [2021-10-03 12:34:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:34:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661879464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:34:50,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:34:50,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-10-03 12:34:50,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853621810] [2021-10-03 12:34:50,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-03 12:34:50,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:34:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-03 12:34:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-10-03 12:34:50,865 INFO L87 Difference]: Start difference. First operand 4632 states and 19313 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2021-10-03 12:34:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:34:57,588 INFO L93 Difference]: Finished difference Result 9074 states and 37688 transitions. [2021-10-03 12:34:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-03 12:34:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 35 [2021-10-03 12:34:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:34:57,616 INFO L225 Difference]: With dead ends: 9074 [2021-10-03 12:34:57,616 INFO L226 Difference]: Without dead ends: 9034 [2021-10-03 12:34:57,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 5624.2ms TimeCoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2021-10-03 12:34:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-10-03 12:34:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 4684. [2021-10-03 12:34:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 4.167627589152253) internal successors, (19517), 4683 states have internal predecessors, (19517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:34:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 19517 transitions. [2021-10-03 12:34:57,824 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 19517 transitions. Word has length 35 [2021-10-03 12:34:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:34:57,824 INFO L470 AbstractCegarLoop]: Abstraction has 4684 states and 19517 transitions. [2021-10-03 12:34:57,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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) [2021-10-03 12:34:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 19517 transitions. [2021-10-03 12:34:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:34:57,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:34:57,833 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:34:57,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-03 12:34:58,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:34:58,036 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:34:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:34:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1552566188, now seen corresponding path program 41 times [2021-10-03 12:34:58,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:34:58,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73196074] [2021-10-03 12:34:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:34:58,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:34:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:35:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:35:00,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:35:00,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73196074] [2021-10-03 12:35:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73196074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:35:00,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891040357] [2021-10-03 12:35:00,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:35:00,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:35:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:35:00,587 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:35:00,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-03 12:35:04,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:35:04,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:35:04,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-03 12:35:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:35:04,437 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 153 treesize of output 145 [2021-10-03 12:35:06,190 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:35:06,190 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 3 case distinctions, treesize of input 55 treesize of output 57 [2021-10-03 12:35:08,284 INFO L354 Elim1Store]: treesize reduction 212, result has 14.9 percent of original size [2021-10-03 12:35:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 97 [2021-10-03 12:35:09,036 INFO L354 Elim1Store]: treesize reduction 116, result has 20.0 percent of original size [2021-10-03 12:35:09,037 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 80 treesize of output 76 [2021-10-03 12:35:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:35:09,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891040357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:35:09,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:35:09,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-10-03 12:35:09,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675234088] [2021-10-03 12:35:09,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-03 12:35:09,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:35:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-03 12:35:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:35:09,132 INFO L87 Difference]: Start difference. First operand 4684 states and 19517 transitions. Second operand has 33 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:35:23,961 INFO L93 Difference]: Finished difference Result 7455 states and 30595 transitions. [2021-10-03 12:35:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:35:23,961 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:35:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:35:23,983 INFO L225 Difference]: With dead ends: 7455 [2021-10-03 12:35:23,983 INFO L226 Difference]: Without dead ends: 7432 [2021-10-03 12:35:23,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 7329.1ms TimeCoverageRelationStatistics Valid=243, Invalid=2408, Unknown=1, NotChecked=0, Total=2652 [2021-10-03 12:35:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-10-03 12:35:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 4648. [2021-10-03 12:35:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.171508500107596) internal successors, (19385), 4647 states have internal predecessors, (19385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 19385 transitions. [2021-10-03 12:35:24,093 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 19385 transitions. Word has length 35 [2021-10-03 12:35:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:35:24,093 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 19385 transitions. [2021-10-03 12:35:24,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 19385 transitions. [2021-10-03 12:35:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:35:24,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:35:24,103 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:35:24,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-03 12:35:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:35:24,317 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:35:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:35:24,318 INFO L82 PathProgramCache]: Analyzing trace with hash -65832884, now seen corresponding path program 42 times [2021-10-03 12:35:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:35:24,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391959457] [2021-10-03 12:35:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:35:24,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:35:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:35:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:35:26,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:35:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391959457] [2021-10-03 12:35:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391959457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:35:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685507584] [2021-10-03 12:35:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:35:26,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:35:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:35:26,659 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:35:26,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-03 12:35:30,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 12:35:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:35:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-03 12:35:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:35:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:35:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:35:30,754 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 31 treesize of output 29 [2021-10-03 12:35:31,663 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:35:31,664 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 37 treesize of output 39 [2021-10-03 12:35:31,818 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:35:31,818 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 37 treesize of output 39 [2021-10-03 12:35:32,348 INFO L354 Elim1Store]: treesize reduction 20, result has 81.0 percent of original size [2021-10-03 12:35:32,349 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 73 treesize of output 117 [2021-10-03 12:35:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:35:32,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685507584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:35:32,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:35:32,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2021-10-03 12:35:32,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048160966] [2021-10-03 12:35:32,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:35:32,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:35:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:35:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:35:32,617 INFO L87 Difference]: Start difference. First operand 4648 states and 19385 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:35:37,221 INFO L93 Difference]: Finished difference Result 7839 states and 32651 transitions. [2021-10-03 12:35:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:35:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-10-03 12:35:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:35:37,245 INFO L225 Difference]: With dead ends: 7839 [2021-10-03 12:35:37,245 INFO L226 Difference]: Without dead ends: 7816 [2021-10-03 12:35:37,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3273.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-10-03 12:35:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7816 states. [2021-10-03 12:35:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7816 to 4648. [2021-10-03 12:35:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.171508500107596) internal successors, (19385), 4647 states have internal predecessors, (19385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 19385 transitions. [2021-10-03 12:35:37,363 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 19385 transitions. Word has length 35 [2021-10-03 12:35:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:35:37,363 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 19385 transitions. [2021-10-03 12:35:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 19385 transitions. [2021-10-03 12:35:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:35:37,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:35:37,373 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:35:37,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-03 12:35:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:35:37,574 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:35:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:35:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash -650236810, now seen corresponding path program 43 times [2021-10-03 12:35:37,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:35:37,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467440842] [2021-10-03 12:35:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:35:37,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:35:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:35:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:35:39,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:35:39,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467440842] [2021-10-03 12:35:39,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467440842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:35:39,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371247208] [2021-10-03 12:35:39,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:35:39,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:35:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:35:39,378 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:35:39,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-03 12:35:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:35:43,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-03 12:35:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:35:44,794 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-03 12:35:44,794 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 42 treesize of output 44 [2021-10-03 12:35:45,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:35:45,908 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-03 12:35:45,909 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 69 [2021-10-03 12:35:48,172 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-03 12:35:48,172 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 76 treesize of output 64 [2021-10-03 12:35:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:35:48,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371247208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:35:48,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:35:48,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-03 12:35:48,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893167487] [2021-10-03 12:35:48,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-03 12:35:48,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:35:48,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-03 12:35:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-10-03 12:35:48,334 INFO L87 Difference]: Start difference. First operand 4648 states and 19385 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-10-03 12:35:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:35:59,127 INFO L93 Difference]: Finished difference Result 7589 states and 31392 transitions. [2021-10-03 12:35:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:35:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 [2021-10-03 12:35:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:35:59,148 INFO L225 Difference]: With dead ends: 7589 [2021-10-03 12:35:59,148 INFO L226 Difference]: Without dead ends: 7543 [2021-10-03 12:35:59,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 10393.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:35:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7543 states. [2021-10-03 12:35:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7543 to 4648. [2021-10-03 12:35:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.171508500107596) internal successors, (19385), 4647 states have internal predecessors, (19385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:35:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 19385 transitions. [2021-10-03 12:35:59,262 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 19385 transitions. Word has length 35 [2021-10-03 12:35:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:35:59,262 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 19385 transitions. [2021-10-03 12:35:59,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-10-03 12:35:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 19385 transitions. [2021-10-03 12:35:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:35:59,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:35:59,272 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:35:59,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-03 12:35:59,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-03 12:35:59,474 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:35:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:35:59,475 INFO L82 PathProgramCache]: Analyzing trace with hash 302442622, now seen corresponding path program 44 times [2021-10-03 12:35:59,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:35:59,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943412201] [2021-10-03 12:35:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:35:59,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:35:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:36:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:36:02,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:36:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943412201] [2021-10-03 12:36:02,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943412201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:36:02,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918823279] [2021-10-03 12:36:02,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:36:02,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:36:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:36:02,168 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:36:02,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-03 12:36:06,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:36:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:36:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-03 12:36:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:36:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:36:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:36:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:36:06,306 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 38 treesize of output 34 [2021-10-03 12:36:07,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:36:08,023 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:36:08,023 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 42 treesize of output 44 [2021-10-03 12:36:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:36:08,935 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-03 12:36:08,935 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 78 treesize of output 79 [2021-10-03 12:36:09,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:36:09,262 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-03 12:36:09,262 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 73 treesize of output 74 [2021-10-03 12:36:12,655 INFO L354 Elim1Store]: treesize reduction 61, result has 38.4 percent of original size [2021-10-03 12:36:12,656 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 68 treesize of output 69 [2021-10-03 12:36:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:36:12,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918823279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:36:12,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:36:12,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-03 12:36:12,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729201709] [2021-10-03 12:36:12,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-03 12:36:12,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:36:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-03 12:36:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=724, Unknown=1, NotChecked=0, Total=812 [2021-10-03 12:36:12,739 INFO L87 Difference]: Start difference. First operand 4648 states and 19385 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2021-10-03 12:36:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:36:21,203 INFO L93 Difference]: Finished difference Result 6616 states and 27609 transitions. [2021-10-03 12:36:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:36:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 35 [2021-10-03 12:36:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:36:21,222 INFO L225 Difference]: With dead ends: 6616 [2021-10-03 12:36:21,222 INFO L226 Difference]: Without dead ends: 6593 [2021-10-03 12:36:21,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 6186.2ms TimeCoverageRelationStatistics Valid=182, Invalid=1539, Unknown=1, NotChecked=0, Total=1722 [2021-10-03 12:36:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2021-10-03 12:36:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 4912. [2021-10-03 12:36:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 4.1610669924658925) internal successors, (20435), 4911 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:36:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 20435 transitions. [2021-10-03 12:36:21,329 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 20435 transitions. Word has length 35 [2021-10-03 12:36:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:36:21,330 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 20435 transitions. [2021-10-03 12:36:21,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2021-10-03 12:36:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 20435 transitions. [2021-10-03 12:36:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:36:21,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:36:21,340 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:36:21,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-03 12:36:21,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-03 12:36:21,541 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:36:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:36:21,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1442978054, now seen corresponding path program 45 times [2021-10-03 12:36:21,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:36:21,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719495293] [2021-10-03 12:36:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:36:21,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:36:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:36:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:36:24,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:36:24,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719495293] [2021-10-03 12:36:24,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719495293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:36:24,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166754053] [2021-10-03 12:36:24,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:36:24,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:36:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:36:24,125 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:36:24,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-03 12:36:28,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:36:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:36:28,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-03 12:36:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:36:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:36:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:36:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-03 12:36:28,379 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 23 treesize of output 21 [2021-10-03 12:36:29,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:36:29,900 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:36:29,901 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 42 treesize of output 44 [2021-10-03 12:36:30,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:36:30,468 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-03 12:36:30,468 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 64 treesize of output 65 [2021-10-03 12:36:30,678 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-03 12:36:30,678 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 43 treesize of output 45 [2021-10-03 12:36:31,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:36:31,062 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 45 treesize of output 35 [2021-10-03 12:36:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:36:31,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166754053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:36:31,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:36:31,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-03 12:36:31,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530055544] [2021-10-03 12:36:31,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-03 12:36:31,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:36:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-03 12:36:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:36:31,137 INFO L87 Difference]: Start difference. First operand 4912 states and 20435 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:36:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:36:34,731 INFO L93 Difference]: Finished difference Result 7971 states and 33083 transitions. [2021-10-03 12:36:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:36:34,731 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-03 12:36:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:36:34,865 INFO L225 Difference]: With dead ends: 7971 [2021-10-03 12:36:34,865 INFO L226 Difference]: Without dead ends: 7948 [2021-10-03 12:36:34,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3602.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:36:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-10-03 12:36:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 4806. [2021-10-03 12:36:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 4805 states have (on average 4.149219562955255) internal successors, (19937), 4805 states have internal predecessors, (19937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:36:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 19937 transitions. [2021-10-03 12:36:34,977 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 19937 transitions. Word has length 35 [2021-10-03 12:36:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:36:34,978 INFO L470 AbstractCegarLoop]: Abstraction has 4806 states and 19937 transitions. [2021-10-03 12:36:34,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:36:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 19937 transitions. [2021-10-03 12:36:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-03 12:36:34,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:36:34,988 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:36:35,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-03 12:36:35,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-03 12:36:35,189 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-03 12:36:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:36:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash -526289396, now seen corresponding path program 46 times [2021-10-03 12:36:35,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:36:35,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207788784] [2021-10-03 12:36:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:36:35,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:36:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:36:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:36:37,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:36:37,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207788784] [2021-10-03 12:36:37,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207788784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:36:37,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566996697] [2021-10-03 12:36:37,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:36:37,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:36:37,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:36:37,938 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:36:37,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-03 12:36:42,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:36:42,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:36:42,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-03 12:36:42,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:36:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-03 12:36:44,223 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-03 12:36:44,223 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 42 treesize of output 44 [2021-10-03 12:36:45,184 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 22 treesize of output 18 [2021-10-03 12:36:45,682 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-03 12:36:45,682 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 37 treesize of output 36 [2021-10-03 12:36:45,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 12:36:45,962 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 32 treesize of output 36 [2021-10-03 12:36:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:36:46,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566996697] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:36:46,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:36:46,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2021-10-03 12:36:46,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713134524] [2021-10-03 12:36:46,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-03 12:36:46,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:36:46,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-03 12:36:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:36:46,064 INFO L87 Difference]: Start difference. First operand 4806 states and 19937 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:36:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:36:56,105 INFO L93 Difference]: Finished difference Result 10313 states and 42382 transitions. [2021-10-03 12:36:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-03 12:36:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 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 [2021-10-03 12:36:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:36:56,106 INFO L225 Difference]: With dead ends: 10313 [2021-10-03 12:36:56,106 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 12:36:56,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 7298.3ms TimeCoverageRelationStatistics Valid=388, Invalid=3772, Unknown=0, NotChecked=0, Total=4160 [2021-10-03 12:36:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 12:36:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 12:36:56,107 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) [2021-10-03 12:36:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 12:36:56,107 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-10-03 12:36:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:36:56,107 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 12:36:56,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:36:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 12:36:56,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 12:36:56,110 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:36:56,110 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:36:56,111 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:36:56,111 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-03 12:36:56,111 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-03 12:36:56,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-03 12:36:56,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-03 12:36:56,317 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:36:56,317 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:36:56,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:36:56 BasicIcfg [2021-10-03 12:36:56,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:36:56,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:36:56,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:36:56,320 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:36:56,320 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:26:25" (3/4) ... [2021-10-03 12:36:56,323 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 12:36:56,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 12:36:56,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 12:36:56,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-03 12:36:56,331 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread4 [2021-10-03 12:36:56,337 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-03 12:36:56,338 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-03 12:36:56,338 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:36:56,338 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-03 12:36:56,403 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:36:56,403 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:36:56,404 INFO L168 Benchmark]: Toolchain (without parser) took 632408.70 ms. Allocated memory was 58.7 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 34.5 MB in the beginning and 1.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,405 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory was 20.7 MB in the beginning and 20.7 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:36:56,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.01 ms. Allocated memory is still 58.7 MB. Free memory was 34.2 MB in the beginning and 38.0 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.76 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 35.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,406 INFO L168 Benchmark]: Boogie Preprocessor took 40.09 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 34.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,407 INFO L168 Benchmark]: RCFGBuilder took 1060.64 ms. Allocated memory is still 58.7 MB. Free memory was 33.8 MB in the beginning and 39.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,407 INFO L168 Benchmark]: TraceAbstraction took 630831.08 ms. Allocated memory was 58.7 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 38.4 MB in the beginning and 1.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,408 INFO L168 Benchmark]: Witness Printer took 83.52 ms. Allocated memory is still 2.9 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:36:56,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory was 20.7 MB in the beginning and 20.7 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.01 ms. Allocated memory is still 58.7 MB. Free memory was 34.2 MB in the beginning and 38.0 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.76 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 35.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.09 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 34.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1060.64 ms. Allocated memory is still 58.7 MB. Free memory was 33.8 MB in the beginning and 39.0 MB in the end (delta: -5.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 630831.08 ms. Allocated memory was 58.7 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 38.4 MB in the beginning and 1.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. * Witness Printer took 83.52 ms. Allocated memory is still 2.9 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.2 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: 7776.1ms, 198 PlacesBefore, 46 PlacesAfterwards, 204 TransitionsBefore, 40 TransitionsAfterwards, 1100 CoEnabledTransitionPairs, 7 FixpointIterations, 130 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 8 ConcurrentYvCompositions, 12 ChoiceCompositions, 184 TotalNumberOfCompositions, 2873 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2191, positive: 2081, positive conditional: 0, positive unconditional: 2081, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 778, positive: 757, positive conditional: 0, positive unconditional: 757, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 778, positive: 748, positive conditional: 0, positive unconditional: 748, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 30, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 96, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 69, negative conditional: 0, negative unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2191, positive: 1324, positive conditional: 0, positive unconditional: 1324, negative: 89, negative conditional: 0, negative unconditional: 89, unknown: 778, unknown conditional: 0, unknown unconditional: 778] , Statistics on independence cache: Total cache size (in pairs): 168, Positive cache size: 160, Positive conditional cache size: 0, Positive unconditional cache size: 160, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - 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: 95]: 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 9 procedures, 208 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 630659.6ms, OverallIterations: 58, TraceHistogramMax: 1, EmptinessCheckTime: 501.7ms, AutomataDifference: 252413.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7864.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2343 SDtfs, 17113 SDslu, 22907 SDs, 0 SdLazy, 67282 SolverSat, 4198 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 110091.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3243 GetRequests, 1100 SyntacticMatches, 45 SemanticMatches, 2098 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19007 ImplicationChecksByTransitivity, 208225.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4912occurred in iteration=56, InterpolantAutomatonStates: 1258, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5231.8ms AutomataMinimizationTime, 58 MinimizatonAttempts, 99687 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 843.9ms SsaConstructionTime, 5635.9ms SatisfiabilityAnalysisTime, 241802.3ms InterpolantComputationTime, 3655 NumberOfCodeBlocks, 3655 NumberOfCodeBlocksAsserted, 161 NumberOfCheckSat, 3548 ConstructedInterpolants, 330 QuantifiedInterpolants, 174219 SizeOfPredicates, 1457 NumberOfNonLiveVariables, 14198 ConjunctsInSsa, 3171 ConjunctsInUnsatCore, 107 InterpolantComputations, 10 PerfectInterpolantSequences, 118/691 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! [2021-10-03 12:36:56,632 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 [2021-10-03 12:36:56,652 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...