./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 [2021-10-04 19:09:17,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 19:09:17,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 19:09:17,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 19:09:17,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 19:09:17,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 19:09:17,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 19:09:17,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 19:09:17,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 19:09:17,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 19:09:17,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 19:09:17,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 19:09:17,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 19:09:17,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 19:09:17,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 19:09:17,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 19:09:17,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 19:09:17,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 19:09:17,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 19:09:17,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 19:09:17,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 19:09:17,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 19:09:17,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 19:09:17,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 19:09:17,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 19:09:17,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 19:09:17,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 19:09:17,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 19:09:17,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 19:09:17,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 19:09:17,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 19:09:17,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 19:09:17,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 19:09:17,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 19:09:17,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 19:09:17,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 19:09:17,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 19:09:17,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 19:09:17,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 19:09:17,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 19:09:17,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 19:09:17,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 19:09:17,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 19:09:17,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 19:09:17,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 19:09:17,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 19:09:17,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 19:09:17,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 19:09:17,650 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 19:09:17,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 19:09:17,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 19:09:17,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 19:09:17,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 19:09:17,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 19:09:17,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 19:09:17,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 19:09:17,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 19:09:17,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 19:09:17,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 19:09:17,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 19:09:17,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 19:09:17,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 19:09:17,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 19:09:17,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 19:09:17,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:09:17,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 19:09:17,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 19:09:17,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 19:09:17,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 19:09:17,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 19:09:17,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 19:09:17,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 19:09:17,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29cbef6196dd6abb8fd0b8f82a83e7f566bfefc0 [2021-10-04 19:09:18,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 19:09:18,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 19:09:18,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 19:09:18,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 19:09:18,080 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 19:09:18,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c [2021-10-04 19:09:18,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16c4e5e21/018e21fd19ee47f1a0e9cd217ed4e9d6/FLAGd7c5a7afb [2021-10-04 19:09:18,879 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 19:09:18,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c [2021-10-04 19:09:18,880 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:09:18,880 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:09:18,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16c4e5e21/018e21fd19ee47f1a0e9cd217ed4e9d6/FLAGd7c5a7afb [2021-10-04 19:09:19,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16c4e5e21/018e21fd19ee47f1a0e9cd217ed4e9d6 [2021-10-04 19:09:19,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 19:09:19,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 19:09:19,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 19:09:19,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 19:09:19,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 19:09:19,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4639d07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19, skipping insertion in model container [2021-10-04 19:09:19,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 19:09:19,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 19:09:19,432 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:09:19,468 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-04 19:09:19,488 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] [2021-10-04 19:09:19,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:09:19,520 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 19:09:19,535 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:09:19,563 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-04 19:09:19,588 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] [2021-10-04 19:09:19,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:09:19,616 INFO L208 MainTranslator]: Completed translation [2021-10-04 19:09:19,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19 WrapperNode [2021-10-04 19:09:19,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 19:09:19,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 19:09:19,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 19:09:19,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 19:09:19,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 19:09:19,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 19:09:19,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 19:09:19,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 19:09:19,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 19:09:19,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 19:09:19,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 19:09:19,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 19:09:19,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (1/1) ... [2021-10-04 19:09:19,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:09:19,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:09:19,781 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) [2021-10-04 19:09:19,787 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 [2021-10-04 19:09:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 19:09:19,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 19:09:19,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 19:09:19,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 19:09:19,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-04 19:09:19,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-04 19:09:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-04 19:09:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-04 19:09:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 19:09:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 19:09:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-04 19:09:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-04 19:09:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-04 19:09:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 19:09:19,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 19:09:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 19:09:19,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume [2021-10-04 19:09:19,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 19:09:19,845 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 19:09:20,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 19:09:20,768 INFO L299 CfgBuilder]: Removed 37 assume(true) statements. [2021-10-04 19:09:20,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:09:20 BoogieIcfgContainer [2021-10-04 19:09:20,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 19:09:20,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 19:09:20,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 19:09:20,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 19:09:20,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 07:09:19" (1/3) ... [2021-10-04 19:09:20,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6d4b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:09:20, skipping insertion in model container [2021-10-04 19:09:20,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:09:19" (2/3) ... [2021-10-04 19:09:20,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6d4b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:09:20, skipping insertion in model container [2021-10-04 19:09:20,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:09:20" (3/3) ... [2021-10-04 19:09:20,781 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.c [2021-10-04 19:09:20,788 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 19:09:20,788 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 19:09:20,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 19:09:20,789 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 19:09:20,831 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,831 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,831 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,832 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,832 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,832 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,832 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,833 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,833 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,833 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,834 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,835 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,835 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,835 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,835 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,836 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,836 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,836 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,836 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,837 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,837 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,837 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,838 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,838 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,838 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,840 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,840 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,841 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,841 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,841 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,841 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,842 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,842 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,845 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,846 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,846 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,846 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,847 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,849 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,849 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,849 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,849 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,850 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,850 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,850 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,850 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,852 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,852 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,852 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,853 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,853 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,853 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,857 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,858 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,858 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,858 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,858 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,859 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,859 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,859 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:09:20,869 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-04 19:09:20,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 19:09:20,932 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 [2021-10-04 19:09:20,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-04 19:09:20,952 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 19:09:20,965 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 204 transitions, 440 flow [2021-10-04 19:09:20,969 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 204 transitions, 440 flow [2021-10-04 19:09:20,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 204 transitions, 440 flow [2021-10-04 19:09:21,074 INFO L129 PetriNetUnfolder]: 19/200 cut-off events. [2021-10-04 19:09:21,075 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-04 19:09:21,080 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. [2021-10-04 19:09:21,084 INFO L116 LiptonReduction]: Number of co-enabled transitions 1100 [2021-10-04 19:09:28,782 INFO L131 LiptonReduction]: Checked pairs total: 2873 [2021-10-04 19:09:28,783 INFO L133 LiptonReduction]: Total number of compositions: 184 [2021-10-04 19:09:28,796 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 40 transitions, 112 flow [2021-10-04 19:09:28,843 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) [2021-10-04 19:09:28,847 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) [2021-10-04 19:09:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-04 19:09:28,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:28,863 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] [2021-10-04 19:09:28,863 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)] === [2021-10-04 19:09:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:28,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1052019844, now seen corresponding path program 1 times [2021-10-04 19:09:28,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:28,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339087508] [2021-10-04 19:09:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:28,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:29,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:29,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339087508] [2021-10-04 19:09:29,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339087508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:29,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:29,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-04 19:09:29,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822868752] [2021-10-04 19:09:29,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 19:09:29,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:29,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 19:09:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:09:29,346 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) [2021-10-04 19:09:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:29,410 INFO L93 Difference]: Finished difference Result 620 states and 2531 transitions. [2021-10-04 19:09:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 19:09:29,412 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 [2021-10-04 19:09:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:29,440 INFO L225 Difference]: With dead ends: 620 [2021-10-04 19:09:29,440 INFO L226 Difference]: Without dead ends: 591 [2021-10-04 19:09:29,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:09:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-10-04 19:09:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 441. [2021-10-04 19:09:29,590 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) [2021-10-04 19:09:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1784 transitions. [2021-10-04 19:09:29,603 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1784 transitions. Word has length 24 [2021-10-04 19:09:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1784 transitions. [2021-10-04 19:09:29,606 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) [2021-10-04 19:09:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1784 transitions. [2021-10-04 19:09:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:09:29,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:29,619 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] [2021-10-04 19:09:29,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 19:09:29,620 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)] === [2021-10-04 19:09:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -85733858, now seen corresponding path program 1 times [2021-10-04 19:09:29,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:29,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641669507] [2021-10-04 19:09:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:29,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:29,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:29,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641669507] [2021-10-04 19:09:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641669507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:29,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:09:29,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208588836] [2021-10-04 19:09:29,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:29,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:29,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:29,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:29,733 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) [2021-10-04 19:09:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:29,793 INFO L93 Difference]: Finished difference Result 739 states and 2848 transitions. [2021-10-04 19:09:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:09:29,794 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 [2021-10-04 19:09:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:29,802 INFO L225 Difference]: With dead ends: 739 [2021-10-04 19:09:29,803 INFO L226 Difference]: Without dead ends: 689 [2021-10-04 19:09:29,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-10-04 19:09:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 645. [2021-10-04 19:09:29,837 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) [2021-10-04 19:09:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2600 transitions. [2021-10-04 19:09:29,843 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2600 transitions. Word has length 26 [2021-10-04 19:09:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:29,843 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2600 transitions. [2021-10-04 19:09:29,844 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) [2021-10-04 19:09:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2600 transitions. [2021-10-04 19:09:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:09:29,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:29,848 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] [2021-10-04 19:09:29,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-04 19:09:29,848 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)] === [2021-10-04 19:09:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1305296432, now seen corresponding path program 1 times [2021-10-04 19:09:29,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:29,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225541510] [2021-10-04 19:09:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:29,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:29,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:29,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225541510] [2021-10-04 19:09:29,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225541510] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:29,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:29,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:09:29,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727349125] [2021-10-04 19:09:29,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:29,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:29,925 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) [2021-10-04 19:09:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:29,980 INFO L93 Difference]: Finished difference Result 961 states and 3846 transitions. [2021-10-04 19:09:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:09:29,980 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 [2021-10-04 19:09:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:29,991 INFO L225 Difference]: With dead ends: 961 [2021-10-04 19:09:29,991 INFO L226 Difference]: Without dead ends: 933 [2021-10-04 19:09:29,992 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 [2021-10-04 19:09:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-10-04 19:09:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 933. [2021-10-04 19:09:30,049 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) [2021-10-04 19:09:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 3761 transitions. [2021-10-04 19:09:30,057 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 3761 transitions. Word has length 26 [2021-10-04 19:09:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:30,057 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 3761 transitions. [2021-10-04 19:09:30,057 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) [2021-10-04 19:09:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 3761 transitions. [2021-10-04 19:09:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:09:30,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:30,062 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] [2021-10-04 19:09:30,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-04 19:09:30,063 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)] === [2021-10-04 19:09:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1203492082, now seen corresponding path program 2 times [2021-10-04 19:09:30,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:30,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785966505] [2021-10-04 19:09:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:30,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:30,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:30,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785966505] [2021-10-04 19:09:30,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785966505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:30,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:30,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:09:30,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470001141] [2021-10-04 19:09:30,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:30,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:30,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:30,129 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) [2021-10-04 19:09:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:30,197 INFO L93 Difference]: Finished difference Result 807 states and 3232 transitions. [2021-10-04 19:09:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:09:30,198 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 [2021-10-04 19:09:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:30,207 INFO L225 Difference]: With dead ends: 807 [2021-10-04 19:09:30,208 INFO L226 Difference]: Without dead ends: 807 [2021-10-04 19:09:30,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:09:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-10-04 19:09:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-10-04 19:09:30,240 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) [2021-10-04 19:09:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 3232 transitions. [2021-10-04 19:09:30,263 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 3232 transitions. Word has length 26 [2021-10-04 19:09:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:30,264 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 3232 transitions. [2021-10-04 19:09:30,265 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) [2021-10-04 19:09:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 3232 transitions. [2021-10-04 19:09:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-04 19:09:30,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:30,270 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] [2021-10-04 19:09:30,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-04 19:09:30,271 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)] === [2021-10-04 19:09:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1968286514, now seen corresponding path program 1 times [2021-10-04 19:09:30,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:30,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444979500] [2021-10-04 19:09:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:30,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:09:30,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:30,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444979500] [2021-10-04 19:09:30,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444979500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:30,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-04 19:09:30,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431156691] [2021-10-04 19:09:30,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:30,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:30,345 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) [2021-10-04 19:09:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:30,403 INFO L93 Difference]: Finished difference Result 1408 states and 5134 transitions. [2021-10-04 19:09:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:09:30,403 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 [2021-10-04 19:09:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:30,418 INFO L225 Difference]: With dead ends: 1408 [2021-10-04 19:09:30,418 INFO L226 Difference]: Without dead ends: 1304 [2021-10-04 19:09:30,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:09:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-10-04 19:09:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 890. [2021-10-04 19:09:30,461 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) [2021-10-04 19:09:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3543 transitions. [2021-10-04 19:09:30,468 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3543 transitions. Word has length 28 [2021-10-04 19:09:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:30,469 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 3543 transitions. [2021-10-04 19:09:30,469 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) [2021-10-04 19:09:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3543 transitions. [2021-10-04 19:09:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-04 19:09:30,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:30,475 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] [2021-10-04 19:09:30,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-04 19:09:30,475 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)] === [2021-10-04 19:09:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1678344374, now seen corresponding path program 1 times [2021-10-04 19:09:30,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:30,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614305269] [2021-10-04 19:09:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:30,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:30,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:30,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614305269] [2021-10-04 19:09:30,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614305269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:30,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:30,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:09:30,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510146738] [2021-10-04 19:09:30,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:30,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:30,537 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) [2021-10-04 19:09:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:30,594 INFO L93 Difference]: Finished difference Result 1245 states and 4695 transitions. [2021-10-04 19:09:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:09:30,595 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 [2021-10-04 19:09:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:30,607 INFO L225 Difference]: With dead ends: 1245 [2021-10-04 19:09:30,607 INFO L226 Difference]: Without dead ends: 1141 [2021-10-04 19:09:30,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-10-04 19:09:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 941. [2021-10-04 19:09:30,651 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) [2021-10-04 19:09:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3735 transitions. [2021-10-04 19:09:30,659 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3735 transitions. Word has length 28 [2021-10-04 19:09:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:30,660 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 3735 transitions. [2021-10-04 19:09:30,660 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) [2021-10-04 19:09:30,660 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3735 transitions. [2021-10-04 19:09:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-04 19:09:30,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:30,666 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] [2021-10-04 19:09:30,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-04 19:09:30,667 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)] === [2021-10-04 19:09:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1737061692, now seen corresponding path program 1 times [2021-10-04 19:09:30,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:30,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333903327] [2021-10-04 19:09:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:30,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:09:30,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:30,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333903327] [2021-10-04 19:09:30,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333903327] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:30,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:30,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-04 19:09:30,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490812190] [2021-10-04 19:09:30,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 19:09:30,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 19:09:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:09:30,737 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) [2021-10-04 19:09:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:30,838 INFO L93 Difference]: Finished difference Result 1565 states and 5892 transitions. [2021-10-04 19:09:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:09:30,838 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 [2021-10-04 19:09:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:30,854 INFO L225 Difference]: With dead ends: 1565 [2021-10-04 19:09:30,854 INFO L226 Difference]: Without dead ends: 1502 [2021-10-04 19:09:30,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-04 19:09:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-10-04 19:09:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 943. [2021-10-04 19:09:30,901 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) [2021-10-04 19:09:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3738 transitions. [2021-10-04 19:09:30,907 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3738 transitions. Word has length 29 [2021-10-04 19:09:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 3738 transitions. [2021-10-04 19:09:30,908 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) [2021-10-04 19:09:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3738 transitions. [2021-10-04 19:09:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-04 19:09:30,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:30,913 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] [2021-10-04 19:09:30,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-04 19:09:30,914 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)] === [2021-10-04 19:09:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:30,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1914528298, now seen corresponding path program 1 times [2021-10-04 19:09:30,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:30,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944297558] [2021-10-04 19:09:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:30,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:09:30,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:30,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944297558] [2021-10-04 19:09:30,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944297558] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:30,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:30,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-04 19:09:30,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401401366] [2021-10-04 19:09:30,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 19:09:30,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 19:09:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:09:30,998 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) [2021-10-04 19:09:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:31,091 INFO L93 Difference]: Finished difference Result 1081 states and 4087 transitions. [2021-10-04 19:09:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:09:31,092 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 [2021-10-04 19:09:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:31,104 INFO L225 Difference]: With dead ends: 1081 [2021-10-04 19:09:31,104 INFO L226 Difference]: Without dead ends: 1062 [2021-10-04 19:09:31,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-04 19:09:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-10-04 19:09:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 944. [2021-10-04 19:09:31,144 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) [2021-10-04 19:09:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3738 transitions. [2021-10-04 19:09:31,152 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3738 transitions. Word has length 29 [2021-10-04 19:09:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:31,152 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 3738 transitions. [2021-10-04 19:09:31,153 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) [2021-10-04 19:09:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3738 transitions. [2021-10-04 19:09:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-04 19:09:31,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:31,158 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] [2021-10-04 19:09:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-04 19:09:31,158 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)] === [2021-10-04 19:09:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1203084002, now seen corresponding path program 1 times [2021-10-04 19:09:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:31,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714995962] [2021-10-04 19:09:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:31,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:09:31,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:31,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714995962] [2021-10-04 19:09:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714995962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:31,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611234180] [2021-10-04 19:09:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:31,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:09:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:09:31,228 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) [2021-10-04 19:09:31,255 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 [2021-10-04 19:09:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:31,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:09:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:09:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:09:31,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611234180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:31,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:09:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-04 19:09:31,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952690698] [2021-10-04 19:09:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 19:09:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 19:09:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:09:31,498 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) [2021-10-04 19:09:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:31,582 INFO L93 Difference]: Finished difference Result 990 states and 3828 transitions. [2021-10-04 19:09:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:09:31,583 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 [2021-10-04 19:09:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:31,594 INFO L225 Difference]: With dead ends: 990 [2021-10-04 19:09:31,594 INFO L226 Difference]: Without dead ends: 939 [2021-10-04 19:09:31,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-04 19:09:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-10-04 19:09:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 791. [2021-10-04 19:09:31,634 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) [2021-10-04 19:09:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3104 transitions. [2021-10-04 19:09:31,640 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3104 transitions. Word has length 30 [2021-10-04 19:09:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:31,641 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 3104 transitions. [2021-10-04 19:09:31,641 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) [2021-10-04 19:09:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3104 transitions. [2021-10-04 19:09:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-04 19:09:31,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:31,646 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] [2021-10-04 19:09:31,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-04 19:09:31,860 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 [2021-10-04 19:09:31,861 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)] === [2021-10-04 19:09:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1670072908, now seen corresponding path program 1 times [2021-10-04 19:09:31,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:31,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931219641] [2021-10-04 19:09:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:31,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:09:31,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:31,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931219641] [2021-10-04 19:09:31,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931219641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:31,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105627730] [2021-10-04 19:09:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:31,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:09:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:09:31,934 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) [2021-10-04 19:09:31,939 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 [2021-10-04 19:09:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:32,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:09:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:09:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:09:32,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105627730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:32,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:09:32,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-04 19:09:32,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282665549] [2021-10-04 19:09:32,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 19:09:32,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 19:09:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:09:32,162 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) [2021-10-04 19:09:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:32,237 INFO L93 Difference]: Finished difference Result 781 states and 2962 transitions. [2021-10-04 19:09:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:09:32,238 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 [2021-10-04 19:09:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:32,246 INFO L225 Difference]: With dead ends: 781 [2021-10-04 19:09:32,247 INFO L226 Difference]: Without dead ends: 698 [2021-10-04 19:09:32,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-04 19:09:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-10-04 19:09:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 698. [2021-10-04 19:09:32,276 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) [2021-10-04 19:09:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2759 transitions. [2021-10-04 19:09:32,281 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2759 transitions. Word has length 30 [2021-10-04 19:09:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:32,282 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 2759 transitions. [2021-10-04 19:09:32,282 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) [2021-10-04 19:09:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2759 transitions. [2021-10-04 19:09:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-04 19:09:32,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:32,286 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] [2021-10-04 19:09:32,327 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 [2021-10-04 19:09:32,500 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 [2021-10-04 19:09:32,501 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)] === [2021-10-04 19:09:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash 113949648, now seen corresponding path program 1 times [2021-10-04 19:09:32,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:32,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996841582] [2021-10-04 19:09:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:32,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:09:32,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:32,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996841582] [2021-10-04 19:09:32,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996841582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:32,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:09:32,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:09:32,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693993947] [2021-10-04 19:09:32,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:32,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:32,561 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) [2021-10-04 19:09:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:32,591 INFO L93 Difference]: Finished difference Result 1376 states and 5568 transitions. [2021-10-04 19:09:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:09:32,592 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 [2021-10-04 19:09:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:32,606 INFO L225 Difference]: With dead ends: 1376 [2021-10-04 19:09:32,606 INFO L226 Difference]: Without dead ends: 1376 [2021-10-04 19:09:32,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:09:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-10-04 19:09:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 948. [2021-10-04 19:09:32,670 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) [2021-10-04 19:09:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 4004 transitions. [2021-10-04 19:09:32,677 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 4004 transitions. Word has length 33 [2021-10-04 19:09:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:32,677 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 4004 transitions. [2021-10-04 19:09:32,677 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) [2021-10-04 19:09:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 4004 transitions. [2021-10-04 19:09:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-04 19:09:32,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:32,682 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] [2021-10-04 19:09:32,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-04 19:09:32,683 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)] === [2021-10-04 19:09:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:32,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2003817458, now seen corresponding path program 1 times [2021-10-04 19:09:32,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:32,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210811831] [2021-10-04 19:09:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:32,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:09:32,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:32,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210811831] [2021-10-04 19:09:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210811831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:32,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674528835] [2021-10-04 19:09:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:32,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:09:32,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:09:32,735 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) [2021-10-04 19:09:32,755 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 [2021-10-04 19:09:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-04 19:09:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:09:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:09:32,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674528835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:09:32,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-04 19:09:32,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-10-04 19:09:32,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630795435] [2021-10-04 19:09:32,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:09:32,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:09:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:09:32,929 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) [2021-10-04 19:09:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:32,959 INFO L93 Difference]: Finished difference Result 1530 states and 6427 transitions. [2021-10-04 19:09:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:09:32,959 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 [2021-10-04 19:09:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:32,977 INFO L225 Difference]: With dead ends: 1530 [2021-10-04 19:09:32,977 INFO L226 Difference]: Without dead ends: 1530 [2021-10-04 19:09:32,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:09:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-10-04 19:09:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1158. [2021-10-04 19:09:33,050 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) [2021-10-04 19:09:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 4940 transitions. [2021-10-04 19:09:33,060 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 4940 transitions. Word has length 33 [2021-10-04 19:09:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:33,060 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 4940 transitions. [2021-10-04 19:09:33,061 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) [2021-10-04 19:09:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 4940 transitions. [2021-10-04 19:09:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:09:33,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:33,067 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] [2021-10-04 19:09:33,107 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 [2021-10-04 19:09:33,280 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 [2021-10-04 19:09:33,281 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)] === [2021-10-04 19:09:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1884034448, now seen corresponding path program 1 times [2021-10-04 19:09:33,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:33,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937379397] [2021-10-04 19:09:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:33,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:36,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:36,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937379397] [2021-10-04 19:09:36,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937379397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:36,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580716565] [2021-10-04 19:09:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:36,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:09:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:09:36,049 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) [2021-10-04 19:09:36,054 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 [2021-10-04 19:09:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-04 19:09:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:09:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,395 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-04 19:09:36,396 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 [2021-10-04 19:09:36,642 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 [2021-10-04 19:09:36,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:36,993 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-10-04 19:09:36,994 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 [2021-10-04 19:09:37,332 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 [2021-10-04 19:09:37,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:37,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:37,894 INFO L354 Elim1Store]: treesize reduction 80, result has 47.7 percent of original size [2021-10-04 19:09:37,895 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 [2021-10-04 19:09:38,220 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 [2021-10-04 19:09:38,464 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 [2021-10-04 19:09:38,757 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 [2021-10-04 19:09:39,353 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-04 19:09:39,354 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 [2021-10-04 19:09:39,582 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-04 19:09:39,582 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 [2021-10-04 19:09:40,544 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-10-04 19:09:40,544 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 [2021-10-04 19:09:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:09:40,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580716565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:40,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:09:40,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-10-04 19:09:40,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077215117] [2021-10-04 19:09:40,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-04 19:09:40,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-04 19:09:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-10-04 19:09:40,656 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) [2021-10-04 19:09:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:09:46,464 INFO L93 Difference]: Finished difference Result 2456 states and 10419 transitions. [2021-10-04 19:09:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:09:46,467 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 [2021-10-04 19:09:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:09:46,502 INFO L225 Difference]: With dead ends: 2456 [2021-10-04 19:09:46,502 INFO L226 Difference]: Without dead ends: 2433 [2021-10-04 19:09:46,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 6188.6ms TimeCoverageRelationStatistics Valid=325, Invalid=2327, Unknown=0, NotChecked=0, Total=2652 [2021-10-04 19:09:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-10-04 19:09:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1324. [2021-10-04 19:09:46,572 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) [2021-10-04 19:09:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5674 transitions. [2021-10-04 19:09:46,579 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5674 transitions. Word has length 35 [2021-10-04 19:09:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:09:46,580 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 5674 transitions. [2021-10-04 19:09:46,580 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) [2021-10-04 19:09:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5674 transitions. [2021-10-04 19:09:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:09:46,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:09:46,586 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] [2021-10-04 19:09:46,621 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 [2021-10-04 19:09:46,799 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 [2021-10-04 19:09:46,800 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)] === [2021-10-04 19:09:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:09:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1459876994, now seen corresponding path program 2 times [2021-10-04 19:09:46,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:09:46,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200172939] [2021-10-04 19:09:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:09:46,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:09:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:09:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:09:49,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:09:49,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200172939] [2021-10-04 19:09:49,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200172939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:49,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789054530] [2021-10-04 19:09:49,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:09:49,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:09:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:09:49,032 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) [2021-10-04 19:09:49,038 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 [2021-10-04 19:09:49,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:09:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:09:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-04 19:09:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:09:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,461 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-04 19:09:49,462 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 [2021-10-04 19:09:49,708 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 [2021-10-04 19:09:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:49,931 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-04 19:09:49,932 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 [2021-10-04 19:09:50,269 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 [2021-10-04 19:09:50,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:09:50,565 INFO L354 Elim1Store]: treesize reduction 104, result has 35.4 percent of original size [2021-10-04 19:09:50,565 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 [2021-10-04 19:09:54,843 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 [2021-10-04 19:09:54,944 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 [2021-10-04 19:09:55,923 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 [2021-10-04 19:09:57,310 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:09:57,310 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 [2021-10-04 19:09:57,800 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:09:57,801 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 [2021-10-04 19:09:58,418 INFO L354 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2021-10-04 19:09:58,419 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 [2021-10-04 19:09:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:09:58,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789054530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:09:58,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:09:58,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-04 19:09:58,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790499507] [2021-10-04 19:09:58,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-04 19:09:58,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:09:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-04 19:09:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:09:58,486 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) [2021-10-04 19:10:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:10:03,485 INFO L93 Difference]: Finished difference Result 2801 states and 11937 transitions. [2021-10-04 19:10:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:10:03,486 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 [2021-10-04 19:10:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:10:03,502 INFO L225 Difference]: With dead ends: 2801 [2021-10-04 19:10:03,502 INFO L226 Difference]: Without dead ends: 2778 [2021-10-04 19:10:03,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5352.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-10-04 19:10:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-10-04 19:10:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 1576. [2021-10-04 19:10:03,577 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) [2021-10-04 19:10:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 6758 transitions. [2021-10-04 19:10:03,586 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 6758 transitions. Word has length 35 [2021-10-04 19:10:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:10:03,587 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 6758 transitions. [2021-10-04 19:10:03,587 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) [2021-10-04 19:10:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 6758 transitions. [2021-10-04 19:10:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:10:03,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:10:03,595 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] [2021-10-04 19:10:03,636 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 [2021-10-04 19:10:03,808 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 [2021-10-04 19:10:03,808 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)] === [2021-10-04 19:10:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:10:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2022178316, now seen corresponding path program 3 times [2021-10-04 19:10:03,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:10:03,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178610356] [2021-10-04 19:10:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:10:03,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:10:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:10:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:10:06,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:10:06,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178610356] [2021-10-04 19:10:06,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178610356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:06,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995818081] [2021-10-04 19:10:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:10:06,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:10:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:10:06,203 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) [2021-10-04 19:10:06,204 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 [2021-10-04 19:10:06,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:10:06,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:10:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-04 19:10:06,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:10:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:10:07,857 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:10:07,858 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 [2021-10-04 19:10:08,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:10:08,047 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:10:08,047 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 [2021-10-04 19:10:08,764 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-04 19:10:08,765 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 [2021-10-04 19:10:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:10:08,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995818081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:08,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:10:08,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-04 19:10:08,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609307505] [2021-10-04 19:10:08,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:10:08,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:10:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:10:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:10:08,865 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) [2021-10-04 19:10:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:10:12,275 INFO L93 Difference]: Finished difference Result 2813 states and 12024 transitions. [2021-10-04 19:10:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-04 19:10:12,275 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 [2021-10-04 19:10:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:10:12,291 INFO L225 Difference]: With dead ends: 2813 [2021-10-04 19:10:12,291 INFO L226 Difference]: Without dead ends: 2790 [2021-10-04 19:10:12,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3708.3ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-10-04 19:10:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2021-10-04 19:10:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1596. [2021-10-04 19:10:12,360 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) [2021-10-04 19:10:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 6846 transitions. [2021-10-04 19:10:12,369 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 6846 transitions. Word has length 35 [2021-10-04 19:10:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:10:12,369 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 6846 transitions. [2021-10-04 19:10:12,370 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) [2021-10-04 19:10:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 6846 transitions. [2021-10-04 19:10:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:10:12,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:10:12,377 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] [2021-10-04 19:10:12,416 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 [2021-10-04 19:10:12,592 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 [2021-10-04 19:10:12,593 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)] === [2021-10-04 19:10:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:10:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1944702868, now seen corresponding path program 4 times [2021-10-04 19:10:12,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:10:12,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593546678] [2021-10-04 19:10:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:10:12,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:10:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:10:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:10:15,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:10:15,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593546678] [2021-10-04 19:10:15,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593546678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:15,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212416989] [2021-10-04 19:10:15,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:10:15,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:10:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:10:15,713 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) [2021-10-04 19:10:15,715 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 [2021-10-04 19:10:16,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:10:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:10:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-04 19:10:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:10:16,363 INFO L354 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2021-10-04 19:10:16,364 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 [2021-10-04 19:10:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:17,125 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-04 19:10:17,126 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 [2021-10-04 19:10:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:18,896 INFO L354 Elim1Store]: treesize reduction 144, result has 31.1 percent of original size [2021-10-04 19:10:18,897 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 [2021-10-04 19:10:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:10:20,589 INFO L354 Elim1Store]: treesize reduction 71, result has 22.0 percent of original size [2021-10-04 19:10:20,589 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 [2021-10-04 19:10:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:10:20,868 INFO L354 Elim1Store]: treesize reduction 45, result has 30.8 percent of original size [2021-10-04 19:10:20,868 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 [2021-10-04 19:10:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:10:21,539 INFO L354 Elim1Store]: treesize reduction 90, result has 41.2 percent of original size [2021-10-04 19:10:21,540 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 [2021-10-04 19:10:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:10:21,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212416989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:21,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:10:21,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-04 19:10:21,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235254626] [2021-10-04 19:10:21,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-04 19:10:21,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:10:21,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-04 19:10:21,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:10:21,756 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) [2021-10-04 19:10:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:10:29,361 INFO L93 Difference]: Finished difference Result 3540 states and 14901 transitions. [2021-10-04 19:10:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-04 19:10:29,361 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 [2021-10-04 19:10:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:10:29,380 INFO L225 Difference]: With dead ends: 3540 [2021-10-04 19:10:29,381 INFO L226 Difference]: Without dead ends: 3500 [2021-10-04 19:10:29,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 7136.5ms TimeCoverageRelationStatistics Valid=377, Invalid=3405, Unknown=0, NotChecked=0, Total=3782 [2021-10-04 19:10:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-10-04 19:10:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1774. [2021-10-04 19:10:29,464 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) [2021-10-04 19:10:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 7508 transitions. [2021-10-04 19:10:29,475 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 7508 transitions. Word has length 35 [2021-10-04 19:10:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:10:29,475 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 7508 transitions. [2021-10-04 19:10:29,476 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) [2021-10-04 19:10:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 7508 transitions. [2021-10-04 19:10:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:10:29,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:10:29,484 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] [2021-10-04 19:10:29,530 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 [2021-10-04 19:10:29,697 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 [2021-10-04 19:10:29,698 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)] === [2021-10-04 19:10:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:10:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2080330338, now seen corresponding path program 5 times [2021-10-04 19:10:29,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:10:29,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464225986] [2021-10-04 19:10:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:10:29,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:10:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:10:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:10:32,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:10:32,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464225986] [2021-10-04 19:10:32,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464225986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:32,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079834513] [2021-10-04 19:10:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:10:32,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:10:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:10:32,095 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) [2021-10-04 19:10:32,096 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 [2021-10-04 19:10:32,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:10:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:10:32,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-04 19:10:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:10:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:32,860 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-04 19:10:32,861 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 [2021-10-04 19:10:33,101 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 [2021-10-04 19:10:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:33,383 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-04 19:10:33,383 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 [2021-10-04 19:10:33,683 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 [2021-10-04 19:10:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:34,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:34,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:34,085 INFO L354 Elim1Store]: treesize reduction 68, result has 47.3 percent of original size [2021-10-04 19:10:34,086 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 [2021-10-04 19:10:34,315 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 [2021-10-04 19:10:34,427 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 [2021-10-04 19:10:35,648 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 245 treesize of output 241 [2021-10-04 19:10:36,669 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:10:36,669 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 [2021-10-04 19:10:37,056 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:10:37,057 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 [2021-10-04 19:10:37,868 INFO L354 Elim1Store]: treesize reduction 37, result has 30.2 percent of original size [2021-10-04 19:10:37,869 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 [2021-10-04 19:10:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:10:37,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079834513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:37,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:10:37,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-04 19:10:37,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226825405] [2021-10-04 19:10:37,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:10:37,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:10:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:10:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:10:37,924 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) [2021-10-04 19:10:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:10:43,271 INFO L93 Difference]: Finished difference Result 3380 states and 14284 transitions. [2021-10-04 19:10:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:10:43,272 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 [2021-10-04 19:10:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:10:43,291 INFO L225 Difference]: With dead ends: 3380 [2021-10-04 19:10:43,291 INFO L226 Difference]: Without dead ends: 3357 [2021-10-04 19:10:43,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5584.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2021-10-04 19:10:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-10-04 19:10:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 1934. [2021-10-04 19:10:43,402 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) [2021-10-04 19:10:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 8188 transitions. [2021-10-04 19:10:43,413 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 8188 transitions. Word has length 35 [2021-10-04 19:10:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:10:43,414 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 8188 transitions. [2021-10-04 19:10:43,414 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) [2021-10-04 19:10:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 8188 transitions. [2021-10-04 19:10:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:10:43,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:10:43,422 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] [2021-10-04 19:10:43,462 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 [2021-10-04 19:10:43,637 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 [2021-10-04 19:10:43,638 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)] === [2021-10-04 19:10:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:10:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1176770366, now seen corresponding path program 6 times [2021-10-04 19:10:43,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:10:43,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391273185] [2021-10-04 19:10:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:10:43,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:10:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:10:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:10:46,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:10:46,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391273185] [2021-10-04 19:10:46,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391273185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:46,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177315330] [2021-10-04 19:10:46,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:10:46,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:10:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:10:46,186 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) [2021-10-04 19:10:46,187 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 [2021-10-04 19:10:46,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:10:46,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:10:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-04 19:10:46,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:10:47,759 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:10:47,760 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 [2021-10-04 19:10:47,894 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:10:47,895 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 [2021-10-04 19:10:48,302 INFO L354 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2021-10-04 19:10:48,302 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 [2021-10-04 19:10:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:10:48,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177315330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:48,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:10:48,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2021-10-04 19:10:48,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560528607] [2021-10-04 19:10:48,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:10:48,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:10:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:10:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:10:48,363 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) [2021-10-04 19:10:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:10:51,420 INFO L93 Difference]: Finished difference Result 3851 states and 16203 transitions. [2021-10-04 19:10:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 19:10:51,420 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 [2021-10-04 19:10:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:10:51,444 INFO L225 Difference]: With dead ends: 3851 [2021-10-04 19:10:51,444 INFO L226 Difference]: Without dead ends: 3828 [2021-10-04 19:10:51,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2899.4ms TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-10-04 19:10:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2021-10-04 19:10:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2231. [2021-10-04 19:10:51,550 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) [2021-10-04 19:10:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 9482 transitions. [2021-10-04 19:10:51,564 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 9482 transitions. Word has length 35 [2021-10-04 19:10:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:10:51,565 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 9482 transitions. [2021-10-04 19:10:51,565 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) [2021-10-04 19:10:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 9482 transitions. [2021-10-04 19:10:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:10:51,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:10:51,574 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] [2021-10-04 19:10:51,620 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 [2021-10-04 19:10:51,787 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 [2021-10-04 19:10:51,787 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)] === [2021-10-04 19:10:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:10:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1289099410, now seen corresponding path program 7 times [2021-10-04 19:10:51,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:10:51,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698532445] [2021-10-04 19:10:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:10:51,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:10:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:10:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:10:54,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:10:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698532445] [2021-10-04 19:10:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698532445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:10:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678810171] [2021-10-04 19:10:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:10:54,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:10:54,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:10:54,508 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) [2021-10-04 19:10:54,511 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 [2021-10-04 19:10:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:10:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-04 19:10:55,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:10:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,474 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-04 19:10:55,474 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 [2021-10-04 19:10:55,728 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 [2021-10-04 19:10:55,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:55,995 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-04 19:10:55,995 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 [2021-10-04 19:10:56,264 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 [2021-10-04 19:10:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:10:56,678 INFO L354 Elim1Store]: treesize reduction 104, result has 35.4 percent of original size [2021-10-04 19:10:56,678 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 [2021-10-04 19:11:00,305 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 [2021-10-04 19:11:00,596 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 [2021-10-04 19:11:01,651 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 184 treesize of output 180 [2021-10-04 19:11:03,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:11:03,311 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:11:03,312 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 [2021-10-04 19:11:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:11:04,323 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-04 19:11:04,323 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 [2021-10-04 19:11:04,834 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-04 19:11:04,835 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 [2021-10-04 19:11:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:11:04,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678810171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:04,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:11:04,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-04 19:11:04,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141134471] [2021-10-04 19:11:04,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-04 19:11:04,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:11:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-04 19:11:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:11:04,926 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) [2021-10-04 19:11:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:11:10,705 INFO L93 Difference]: Finished difference Result 3796 states and 16163 transitions. [2021-10-04 19:11:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:11:10,705 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 [2021-10-04 19:11:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:11:10,722 INFO L225 Difference]: With dead ends: 3796 [2021-10-04 19:11:10,722 INFO L226 Difference]: Without dead ends: 3773 [2021-10-04 19:11:10,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 6847.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2021-10-04 19:11:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-10-04 19:11:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2255. [2021-10-04 19:11:10,810 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) [2021-10-04 19:11:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 9586 transitions. [2021-10-04 19:11:10,822 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 9586 transitions. Word has length 35 [2021-10-04 19:11:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:11:10,823 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 9586 transitions. [2021-10-04 19:11:10,823 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) [2021-10-04 19:11:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 9586 transitions. [2021-10-04 19:11:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:11:10,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:11:10,832 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] [2021-10-04 19:11:10,872 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 [2021-10-04 19:11:11,045 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 [2021-10-04 19:11:11,046 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)] === [2021-10-04 19:11:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:11:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash 950582838, now seen corresponding path program 8 times [2021-10-04 19:11:11,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:11:11,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309775350] [2021-10-04 19:11:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:11:11,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:11:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:11:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:11:13,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:11:14,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309775350] [2021-10-04 19:11:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309775350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:14,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595120584] [2021-10-04 19:11:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:11:14,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:11:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:11:14,001 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) [2021-10-04 19:11:14,002 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 [2021-10-04 19:11:15,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:11:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:11:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-04 19:11:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:11:15,034 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 [2021-10-04 19:11:16,218 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:11:16,218 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 [2021-10-04 19:11:16,533 INFO L354 Elim1Store]: treesize reduction 148, result has 16.9 percent of original size [2021-10-04 19:11:16,533 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 [2021-10-04 19:11:16,836 INFO L354 Elim1Store]: treesize reduction 14, result has 71.4 percent of original size [2021-10-04 19:11:16,836 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 [2021-10-04 19:11:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:11:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595120584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:16,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:11:16,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-10-04 19:11:16,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072155319] [2021-10-04 19:11:16,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:11:16,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:11:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:11:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:11:16,944 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) [2021-10-04 19:11:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:11:22,352 INFO L93 Difference]: Finished difference Result 3821 states and 16106 transitions. [2021-10-04 19:11:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:11:22,353 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 [2021-10-04 19:11:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:11:22,370 INFO L225 Difference]: With dead ends: 3821 [2021-10-04 19:11:22,371 INFO L226 Difference]: Without dead ends: 3798 [2021-10-04 19:11:22,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 5118.2ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-10-04 19:11:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-10-04 19:11:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2234. [2021-10-04 19:11:22,468 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) [2021-10-04 19:11:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 9546 transitions. [2021-10-04 19:11:22,480 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 9546 transitions. Word has length 35 [2021-10-04 19:11:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:11:22,480 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 9546 transitions. [2021-10-04 19:11:22,481 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) [2021-10-04 19:11:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 9546 transitions. [2021-10-04 19:11:22,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:11:22,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:11:22,489 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] [2021-10-04 19:11:22,531 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 [2021-10-04 19:11:22,703 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 [2021-10-04 19:11:22,704 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)] === [2021-10-04 19:11:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:11:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash 711590692, now seen corresponding path program 9 times [2021-10-04 19:11:22,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:11:22,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042570323] [2021-10-04 19:11:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:11:22,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:11:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:11:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:11:25,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:11:25,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042570323] [2021-10-04 19:11:25,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042570323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:25,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237974125] [2021-10-04 19:11:25,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:11:25,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:11:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:11:25,377 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) [2021-10-04 19:11:25,378 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 [2021-10-04 19:11:26,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:11:26,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:11:26,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-04 19:11:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:11:27,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:11:27,785 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:11:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-10-04 19:11:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:11:28,495 INFO L354 Elim1Store]: treesize reduction 120, result has 24.1 percent of original size [2021-10-04 19:11:28,495 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 [2021-10-04 19:11:28,647 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-04 19:11:28,647 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 [2021-10-04 19:11:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:11:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237974125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:28,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:11:28,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-10-04 19:11:28,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612277882] [2021-10-04 19:11:28,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:11:28,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:11:28,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:11:28,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:11:28,734 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) [2021-10-04 19:11:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:11:33,293 INFO L93 Difference]: Finished difference Result 3613 states and 15309 transitions. [2021-10-04 19:11:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-04 19:11:33,293 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 [2021-10-04 19:11:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:11:33,305 INFO L225 Difference]: With dead ends: 3613 [2021-10-04 19:11:33,305 INFO L226 Difference]: Without dead ends: 3590 [2021-10-04 19:11:33,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4549.3ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-10-04 19:11:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2021-10-04 19:11:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2254. [2021-10-04 19:11:33,365 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) [2021-10-04 19:11:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 9622 transitions. [2021-10-04 19:11:33,377 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 9622 transitions. Word has length 35 [2021-10-04 19:11:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:11:33,378 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 9622 transitions. [2021-10-04 19:11:33,378 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) [2021-10-04 19:11:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 9622 transitions. [2021-10-04 19:11:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:11:33,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:11:33,387 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] [2021-10-04 19:11:33,442 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 [2021-10-04 19:11:33,601 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 [2021-10-04 19:11:33,602 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)] === [2021-10-04 19:11:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:11:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1032119438, now seen corresponding path program 10 times [2021-10-04 19:11:33,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:11:33,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595802339] [2021-10-04 19:11:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:11:33,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:11:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:11:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:11:35,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:11:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595802339] [2021-10-04 19:11:35,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595802339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445260914] [2021-10-04 19:11:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:11:35,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:11:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:11:35,522 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) [2021-10-04 19:11:35,523 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 [2021-10-04 19:11:36,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:11:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:11:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-04 19:11:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:11:36,782 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 [2021-10-04 19:11:37,039 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 [2021-10-04 19:11:37,261 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 [2021-10-04 19:11:37,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:11:37,441 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 [2021-10-04 19:11:37,602 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 [2021-10-04 19:11:37,805 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 [2021-10-04 19:11:38,110 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 [2021-10-04 19:11:38,996 INFO L354 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-10-04 19:11:38,997 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 [2021-10-04 19:11:39,876 INFO L354 Elim1Store]: treesize reduction 234, result has 13.3 percent of original size [2021-10-04 19:11:39,877 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 [2021-10-04 19:11:41,305 INFO L354 Elim1Store]: treesize reduction 70, result has 38.6 percent of original size [2021-10-04 19:11:41,306 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 [2021-10-04 19:11:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:11:41,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445260914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:41,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:11:41,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 31 [2021-10-04 19:11:41,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43913866] [2021-10-04 19:11:41,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-04 19:11:41,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:11:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-04 19:11:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:11:41,363 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) [2021-10-04 19:11:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:11:52,955 INFO L93 Difference]: Finished difference Result 4559 states and 19236 transitions. [2021-10-04 19:11:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-04 19:11:52,956 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 [2021-10-04 19:11:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:11:52,969 INFO L225 Difference]: With dead ends: 4559 [2021-10-04 19:11:52,969 INFO L226 Difference]: Without dead ends: 4536 [2021-10-04 19:11:52,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 9348.0ms TimeCoverageRelationStatistics Valid=347, Invalid=3192, Unknown=1, NotChecked=0, Total=3540 [2021-10-04 19:11:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-10-04 19:11:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 2450. [2021-10-04 19:11:53,046 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) [2021-10-04 19:11:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 10434 transitions. [2021-10-04 19:11:53,058 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 10434 transitions. Word has length 35 [2021-10-04 19:11:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:11:53,059 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 10434 transitions. [2021-10-04 19:11:53,059 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) [2021-10-04 19:11:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 10434 transitions. [2021-10-04 19:11:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:11:53,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:11:53,068 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] [2021-10-04 19:11:53,122 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 [2021-10-04 19:11:53,282 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 [2021-10-04 19:11:53,283 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)] === [2021-10-04 19:11:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:11:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash -842926610, now seen corresponding path program 11 times [2021-10-04 19:11:53,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:11:53,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135149361] [2021-10-04 19:11:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:11:53,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:11:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:11:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:11:56,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:11:56,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135149361] [2021-10-04 19:11:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135149361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:11:56,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597234177] [2021-10-04 19:11:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:11:56,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:11:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:11:56,517 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) [2021-10-04 19:11:56,518 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 [2021-10-04 19:11:57,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 19:11:57,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:11:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-04 19:11:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:11:57,929 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 [2021-10-04 19:11:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:11:59,041 INFO L354 Elim1Store]: treesize reduction 71, result has 22.0 percent of original size [2021-10-04 19:11:59,041 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 [2021-10-04 19:11:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:11:59,463 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-10-04 19:11:59,463 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 [2021-10-04 19:12:00,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:12:00,096 INFO L354 Elim1Store]: treesize reduction 31, result has 65.9 percent of original size [2021-10-04 19:12:00,096 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 [2021-10-04 19:12:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:12:00,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597234177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:00,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:12:00,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-10-04 19:12:00,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854940583] [2021-10-04 19:12:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-04 19:12:00,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:12:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-04 19:12:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:12:00,307 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) [2021-10-04 19:12:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:12:06,935 INFO L93 Difference]: Finished difference Result 6074 states and 25672 transitions. [2021-10-04 19:12:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-04 19:12:06,936 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 [2021-10-04 19:12:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:12:06,954 INFO L225 Difference]: With dead ends: 6074 [2021-10-04 19:12:06,955 INFO L226 Difference]: Without dead ends: 6034 [2021-10-04 19:12:06,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 5249.6ms TimeCoverageRelationStatistics Valid=299, Invalid=2457, Unknown=0, NotChecked=0, Total=2756 [2021-10-04 19:12:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-10-04 19:12:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 2466. [2021-10-04 19:12:07,040 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) [2021-10-04 19:12:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 10513 transitions. [2021-10-04 19:12:07,053 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 10513 transitions. Word has length 35 [2021-10-04 19:12:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:12:07,053 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 10513 transitions. [2021-10-04 19:12:07,054 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) [2021-10-04 19:12:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 10513 transitions. [2021-10-04 19:12:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:12:07,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:12:07,063 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] [2021-10-04 19:12:07,111 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 [2021-10-04 19:12:07,277 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 [2021-10-04 19:12:07,278 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)] === [2021-10-04 19:12:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:12:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2108583904, now seen corresponding path program 12 times [2021-10-04 19:12:07,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:12:07,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356651917] [2021-10-04 19:12:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:12:07,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:12:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:12:09,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:12:09,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356651917] [2021-10-04 19:12:09,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356651917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:09,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027586013] [2021-10-04 19:12:09,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:12:09,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:12:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:12:09,118 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) [2021-10-04 19:12:09,119 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 [2021-10-04 19:12:10,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:12:10,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:12:10,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-04 19:12:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:12:11,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:12:11,514 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:12:11,515 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 [2021-10-04 19:12:12,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:12:12,132 INFO L354 Elim1Store]: treesize reduction 128, result has 24.7 percent of original size [2021-10-04 19:12:12,133 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 [2021-10-04 19:12:12,275 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-04 19:12:12,275 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 [2021-10-04 19:12:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:12:12,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027586013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:12,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:12:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-10-04 19:12:12,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481365973] [2021-10-04 19:12:12,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:12:12,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:12:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:12:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:12:12,353 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) [2021-10-04 19:12:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:12:16,705 INFO L93 Difference]: Finished difference Result 4892 states and 20711 transitions. [2021-10-04 19:12:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:12:16,706 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 [2021-10-04 19:12:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:12:16,722 INFO L225 Difference]: With dead ends: 4892 [2021-10-04 19:12:16,722 INFO L226 Difference]: Without dead ends: 4869 [2021-10-04 19:12:16,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2611.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:12:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2021-10-04 19:12:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 2513. [2021-10-04 19:12:16,794 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) [2021-10-04 19:12:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 10694 transitions. [2021-10-04 19:12:16,806 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 10694 transitions. Word has length 35 [2021-10-04 19:12:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:12:16,806 INFO L470 AbstractCegarLoop]: Abstraction has 2513 states and 10694 transitions. [2021-10-04 19:12:16,806 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) [2021-10-04 19:12:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 10694 transitions. [2021-10-04 19:12:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:12:16,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:12:16,813 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] [2021-10-04 19:12:16,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-04 19:12:17,013 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 [2021-10-04 19:12:17,014 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)] === [2021-10-04 19:12:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:12:17,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1799869512, now seen corresponding path program 13 times [2021-10-04 19:12:17,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:12:17,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589096498] [2021-10-04 19:12:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:12:17,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:12:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:12:18,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:12:18,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589096498] [2021-10-04 19:12:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589096498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:18,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247083417] [2021-10-04 19:12:18,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:12:18,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:12:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:12:18,803 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) [2021-10-04 19:12:18,804 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 [2021-10-04 19:12:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-04 19:12:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:12:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:12:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:12:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:12:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:12:20,372 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 [2021-10-04 19:12:20,665 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 [2021-10-04 19:12:20,829 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 [2021-10-04 19:12:20,975 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:12:20,975 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 [2021-10-04 19:12:21,140 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 [2021-10-04 19:12:21,325 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 [2021-10-04 19:12:21,534 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 [2021-10-04 19:12:22,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:12:22,242 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-04 19:12:22,242 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 [2021-10-04 19:12:22,456 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-04 19:12:22,457 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 [2021-10-04 19:12:23,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:12:23,059 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 [2021-10-04 19:12:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:12:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247083417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:23,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:12:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-04 19:12:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70396205] [2021-10-04 19:12:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-04 19:12:23,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:12:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-04 19:12:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:12:23,114 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) [2021-10-04 19:12:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:12:27,378 INFO L93 Difference]: Finished difference Result 4241 states and 17987 transitions. [2021-10-04 19:12:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:12:27,379 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 [2021-10-04 19:12:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:12:27,392 INFO L225 Difference]: With dead ends: 4241 [2021-10-04 19:12:27,392 INFO L226 Difference]: Without dead ends: 4218 [2021-10-04 19:12:27,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3978.1ms TimeCoverageRelationStatistics Valid=223, Invalid=1939, Unknown=0, NotChecked=0, Total=2162 [2021-10-04 19:12:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-10-04 19:12:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2721. [2021-10-04 19:12:27,475 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) [2021-10-04 19:12:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 11542 transitions. [2021-10-04 19:12:27,494 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 11542 transitions. Word has length 35 [2021-10-04 19:12:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:12:27,495 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 11542 transitions. [2021-10-04 19:12:27,495 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) [2021-10-04 19:12:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 11542 transitions. [2021-10-04 19:12:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:12:27,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:12:27,508 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] [2021-10-04 19:12:27,564 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 [2021-10-04 19:12:27,722 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 [2021-10-04 19:12:27,723 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)] === [2021-10-04 19:12:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:12:27,724 INFO L82 PathProgramCache]: Analyzing trace with hash -507442424, now seen corresponding path program 14 times [2021-10-04 19:12:27,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:12:27,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220526602] [2021-10-04 19:12:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:12:27,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:12:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:12:29,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:12:29,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220526602] [2021-10-04 19:12:29,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220526602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:29,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183133473] [2021-10-04 19:12:29,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:12:29,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:12:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:12:29,576 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) [2021-10-04 19:12:29,578 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 [2021-10-04 19:12:31,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:12:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:12:31,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-04 19:12:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:12:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:12:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:12:31,195 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 [2021-10-04 19:12:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:12:32,467 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-04 19:12:32,467 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 [2021-10-04 19:12:32,623 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-04 19:12:32,623 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 [2021-10-04 19:12:32,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:12:32,950 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 [2021-10-04 19:12:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:12:33,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183133473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:33,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:12:33,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-10-04 19:12:33,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494321062] [2021-10-04 19:12:33,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:12:33,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:12:33,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:12:33,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:12:33,015 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) [2021-10-04 19:12:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:12:36,282 INFO L93 Difference]: Finished difference Result 5386 states and 22701 transitions. [2021-10-04 19:12:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:12:36,283 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 [2021-10-04 19:12:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:12:36,300 INFO L225 Difference]: With dead ends: 5386 [2021-10-04 19:12:36,301 INFO L226 Difference]: Without dead ends: 5363 [2021-10-04 19:12:36,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2762.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2021-10-04 19:12:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2021-10-04 19:12:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 2621. [2021-10-04 19:12:36,396 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) [2021-10-04 19:12:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11074 transitions. [2021-10-04 19:12:36,410 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11074 transitions. Word has length 35 [2021-10-04 19:12:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:12:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 11074 transitions. [2021-10-04 19:12:36,411 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) [2021-10-04 19:12:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11074 transitions. [2021-10-04 19:12:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:12:36,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:12:36,421 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] [2021-10-04 19:12:36,472 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 [2021-10-04 19:12:36,634 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 [2021-10-04 19:12:36,635 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)] === [2021-10-04 19:12:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:12:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1104541416, now seen corresponding path program 15 times [2021-10-04 19:12:36,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:12:36,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295832158] [2021-10-04 19:12:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:12:36,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:12:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:12:38,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:12:38,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295832158] [2021-10-04 19:12:38,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295832158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:38,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295365760] [2021-10-04 19:12:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:12:38,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:12:38,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:12:38,985 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) [2021-10-04 19:12:38,986 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 [2021-10-04 19:12:40,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:12:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:12:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-04 19:12:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:12:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:12:41,953 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-04 19:12:41,954 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 [2021-10-04 19:12:42,372 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-04 19:12:42,373 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 56 treesize of output 52 [2021-10-04 19:12:42,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:12:42,501 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 [2021-10-04 19:12:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:12:42,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295365760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:42,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:12:42,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-10-04 19:12:42,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256283933] [2021-10-04 19:12:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:12:42,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:12:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:12:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:12:42,585 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) [2021-10-04 19:12:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:12:47,168 INFO L93 Difference]: Finished difference Result 5386 states and 22721 transitions. [2021-10-04 19:12:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:12:47,169 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 [2021-10-04 19:12:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:12:47,215 INFO L225 Difference]: With dead ends: 5386 [2021-10-04 19:12:47,216 INFO L226 Difference]: Without dead ends: 5363 [2021-10-04 19:12:47,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3331.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-10-04 19:12:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2021-10-04 19:12:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 2585. [2021-10-04 19:12:47,297 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) [2021-10-04 19:12:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 10942 transitions. [2021-10-04 19:12:47,308 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 10942 transitions. Word has length 35 [2021-10-04 19:12:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:12:47,308 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 10942 transitions. [2021-10-04 19:12:47,308 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) [2021-10-04 19:12:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 10942 transitions. [2021-10-04 19:12:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:12:47,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:12:47,316 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] [2021-10-04 19:12:47,348 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 [2021-10-04 19:12:47,516 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 [2021-10-04 19:12:47,517 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)] === [2021-10-04 19:12:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:12:47,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1184939052, now seen corresponding path program 16 times [2021-10-04 19:12:47,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:12:47,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810689584] [2021-10-04 19:12:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:12:47,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:12:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:12:48,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:12:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810689584] [2021-10-04 19:12:48,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810689584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169921895] [2021-10-04 19:12:48,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:12:48,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:12:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:12:48,975 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) [2021-10-04 19:12:48,976 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 [2021-10-04 19:12:50,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:12:50,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:12:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-04 19:12:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:12:52,223 INFO L354 Elim1Store]: treesize reduction 73, result has 21.5 percent of original size [2021-10-04 19:12:52,224 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 [2021-10-04 19:12:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:12:52,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169921895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:52,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:12:52,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-04 19:12:52,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127311263] [2021-10-04 19:12:52,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-04 19:12:52,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:12:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-04 19:12:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:12:52,309 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) [2021-10-04 19:12:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:12:55,763 INFO L93 Difference]: Finished difference Result 3962 states and 16700 transitions. [2021-10-04 19:12:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:12:55,764 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 [2021-10-04 19:12:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:12:55,782 INFO L225 Difference]: With dead ends: 3962 [2021-10-04 19:12:55,782 INFO L226 Difference]: Without dead ends: 3939 [2021-10-04 19:12:55,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2863.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-10-04 19:12:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-10-04 19:12:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2626. [2021-10-04 19:12:55,867 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) [2021-10-04 19:12:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11111 transitions. [2021-10-04 19:12:55,880 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11111 transitions. Word has length 35 [2021-10-04 19:12:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:12:55,881 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 11111 transitions. [2021-10-04 19:12:55,881 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) [2021-10-04 19:12:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11111 transitions. [2021-10-04 19:12:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:12:55,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:12:55,890 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] [2021-10-04 19:12:55,934 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 [2021-10-04 19:12:56,105 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 [2021-10-04 19:12:56,106 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)] === [2021-10-04 19:12:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:12:56,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1619131916, now seen corresponding path program 17 times [2021-10-04 19:12:56,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:12:56,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655703045] [2021-10-04 19:12:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:12:56,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:12:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:12:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:12:57,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:12:57,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655703045] [2021-10-04 19:12:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655703045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:12:57,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076749847] [2021-10-04 19:12:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:12:57,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:12:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:12:57,526 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) [2021-10-04 19:12:57,534 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 [2021-10-04 19:12:59,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 19:12:59,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:12:59,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-04 19:12:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:12:59,445 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 [2021-10-04 19:12:59,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-04 19:12:59,646 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:12:59,647 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 [2021-10-04 19:12:59,749 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 [2021-10-04 19:12:59,848 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 [2021-10-04 19:12:59,973 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 [2021-10-04 19:13:00,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-04 19:13:00,197 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 [2021-10-04 19:13:00,694 INFO L354 Elim1Store]: treesize reduction 65, result has 38.1 percent of original size [2021-10-04 19:13:00,695 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 [2021-10-04 19:13:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:00,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076749847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:00,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:13:00,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-04 19:13:00,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921770994] [2021-10-04 19:13:00,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-04 19:13:00,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:13:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-04 19:13:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:13:00,796 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) [2021-10-04 19:13:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:13:03,457 INFO L93 Difference]: Finished difference Result 3971 states and 16712 transitions. [2021-10-04 19:13:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-04 19:13:03,457 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 [2021-10-04 19:13:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:13:03,469 INFO L225 Difference]: With dead ends: 3971 [2021-10-04 19:13:03,470 INFO L226 Difference]: Without dead ends: 3948 [2021-10-04 19:13:03,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2554.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-10-04 19:13:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-10-04 19:13:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2626. [2021-10-04 19:13:03,525 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) [2021-10-04 19:13:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11114 transitions. [2021-10-04 19:13:03,534 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11114 transitions. Word has length 35 [2021-10-04 19:13:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:13:03,535 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 11114 transitions. [2021-10-04 19:13:03,535 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) [2021-10-04 19:13:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11114 transitions. [2021-10-04 19:13:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:13:03,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:13:03,542 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] [2021-10-04 19:13:03,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-04 19:13:03,743 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 [2021-10-04 19:13:03,744 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)] === [2021-10-04 19:13:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:13:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2107978038, now seen corresponding path program 18 times [2021-10-04 19:13:03,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:13:03,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522951478] [2021-10-04 19:13:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:13:03,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:13:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:13:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:05,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:13:05,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522951478] [2021-10-04 19:13:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522951478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:05,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323530168] [2021-10-04 19:13:05,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:13:05,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:13:05,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:13:05,232 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) [2021-10-04 19:13:05,234 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 [2021-10-04 19:13:07,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 19:13:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:13:07,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-04 19:13:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:13:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,364 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-04 19:13:07,364 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 [2021-10-04 19:13:07,576 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 [2021-10-04 19:13:07,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:07,915 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-04 19:13:07,916 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 [2021-10-04 19:13:08,239 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 [2021-10-04 19:13:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:08,899 INFO L354 Elim1Store]: treesize reduction 120, result has 37.8 percent of original size [2021-10-04 19:13:08,899 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 [2021-10-04 19:13:09,188 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 [2021-10-04 19:13:09,350 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 [2021-10-04 19:13:09,521 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 [2021-10-04 19:13:09,684 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 [2021-10-04 19:13:09,887 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 [2021-10-04 19:13:10,496 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-04 19:13:10,496 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 [2021-10-04 19:13:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:13:10,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323530168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:10,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:13:10,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-04 19:13:10,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127515036] [2021-10-04 19:13:10,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:13:10,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:13:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:13:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:13:10,663 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) [2021-10-04 19:13:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:13:14,275 INFO L93 Difference]: Finished difference Result 4264 states and 17951 transitions. [2021-10-04 19:13:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:13:14,275 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 [2021-10-04 19:13:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:13:14,290 INFO L225 Difference]: With dead ends: 4264 [2021-10-04 19:13:14,290 INFO L226 Difference]: Without dead ends: 4241 [2021-10-04 19:13:14,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3689.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-10-04 19:13:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-10-04 19:13:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2659. [2021-10-04 19:13:14,350 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) [2021-10-04 19:13:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 11237 transitions. [2021-10-04 19:13:14,360 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 11237 transitions. Word has length 35 [2021-10-04 19:13:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:13:14,360 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 11237 transitions. [2021-10-04 19:13:14,361 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) [2021-10-04 19:13:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 11237 transitions. [2021-10-04 19:13:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:13:14,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:13:14,369 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] [2021-10-04 19:13:14,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-04 19:13:14,577 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 [2021-10-04 19:13:14,578 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)] === [2021-10-04 19:13:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:13:14,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1977578306, now seen corresponding path program 19 times [2021-10-04 19:13:14,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:13:14,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751698025] [2021-10-04 19:13:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:13:14,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:13:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:13:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:15,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:13:15,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751698025] [2021-10-04 19:13:15,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751698025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:15,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823625664] [2021-10-04 19:13:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:13:15,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:13:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:13:15,999 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) [2021-10-04 19:13:16,000 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 [2021-10-04 19:13:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:13:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-04 19:13:17,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:13:19,846 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-04 19:13:19,847 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 58 treesize of output 42 [2021-10-04 19:13:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:19,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823625664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:19,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:13:19,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-04 19:13:19,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455515997] [2021-10-04 19:13:19,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-04 19:13:19,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:13:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-04 19:13:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:13:19,899 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) [2021-10-04 19:13:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:13:21,585 INFO L93 Difference]: Finished difference Result 3819 states and 16062 transitions. [2021-10-04 19:13:21,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-04 19:13:21,586 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 [2021-10-04 19:13:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:13:21,597 INFO L225 Difference]: With dead ends: 3819 [2021-10-04 19:13:21,597 INFO L226 Difference]: Without dead ends: 3796 [2021-10-04 19:13:21,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2021-10-04 19:13:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2021-10-04 19:13:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 2857. [2021-10-04 19:13:21,656 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) [2021-10-04 19:13:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 12065 transitions. [2021-10-04 19:13:21,666 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 12065 transitions. Word has length 35 [2021-10-04 19:13:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:13:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 2857 states and 12065 transitions. [2021-10-04 19:13:21,667 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) [2021-10-04 19:13:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 12065 transitions. [2021-10-04 19:13:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:13:21,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:13:21,677 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] [2021-10-04 19:13:21,711 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 [2021-10-04 19:13:21,886 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 [2021-10-04 19:13:21,887 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)] === [2021-10-04 19:13:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:13:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1034111142, now seen corresponding path program 20 times [2021-10-04 19:13:21,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:13:21,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929458434] [2021-10-04 19:13:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:13:21,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:13:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:13:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:23,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:13:23,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929458434] [2021-10-04 19:13:23,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929458434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:23,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476539362] [2021-10-04 19:13:23,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:13:23,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:13:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:13:23,202 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) [2021-10-04 19:13:23,203 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 [2021-10-04 19:13:25,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:13:25,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:13:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-04 19:13:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:13:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,428 INFO L354 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2021-10-04 19:13:25,429 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 [2021-10-04 19:13:25,646 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 [2021-10-04 19:13:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:25,932 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-04 19:13:25,932 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 [2021-10-04 19:13:26,245 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 [2021-10-04 19:13:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:26,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:13:26,839 INFO L354 Elim1Store]: treesize reduction 120, result has 37.8 percent of original size [2021-10-04 19:13:26,840 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 [2021-10-04 19:13:27,226 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 [2021-10-04 19:13:27,399 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 [2021-10-04 19:13:27,561 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 [2021-10-04 19:13:27,733 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 [2021-10-04 19:13:27,880 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 [2021-10-04 19:13:28,928 INFO L354 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2021-10-04 19:13:28,928 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 [2021-10-04 19:13:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:13:29,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476539362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:29,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:13:29,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-04 19:13:29,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739428197] [2021-10-04 19:13:29,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:13:29,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:13:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:13:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:13:29,065 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) [2021-10-04 19:13:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:13:32,139 INFO L93 Difference]: Finished difference Result 4343 states and 18226 transitions. [2021-10-04 19:13:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-04 19:13:32,139 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 [2021-10-04 19:13:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:13:32,155 INFO L225 Difference]: With dead ends: 4343 [2021-10-04 19:13:32,155 INFO L226 Difference]: Without dead ends: 4320 [2021-10-04 19:13:32,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2881.4ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:13:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-10-04 19:13:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 2697. [2021-10-04 19:13:32,246 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) [2021-10-04 19:13:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 11385 transitions. [2021-10-04 19:13:32,260 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 11385 transitions. Word has length 35 [2021-10-04 19:13:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:13:32,260 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 11385 transitions. [2021-10-04 19:13:32,260 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) [2021-10-04 19:13:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 11385 transitions. [2021-10-04 19:13:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:13:32,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:13:32,270 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] [2021-10-04 19:13:32,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-04 19:13:32,485 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 [2021-10-04 19:13:32,486 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)] === [2021-10-04 19:13:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:13:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash 509442134, now seen corresponding path program 21 times [2021-10-04 19:13:32,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:13:32,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702712658] [2021-10-04 19:13:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:13:32,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:13:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:13:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:34,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:13:34,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702712658] [2021-10-04 19:13:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702712658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:34,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997824830] [2021-10-04 19:13:34,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:13:34,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:13:34,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:13:34,066 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) [2021-10-04 19:13:34,066 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 [2021-10-04 19:13:36,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 19:13:36,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:13:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-04 19:13:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:13:36,411 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 [2021-10-04 19:13:36,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-04 19:13:36,664 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:13:36,665 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 [2021-10-04 19:13:36,785 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 [2021-10-04 19:13:36,878 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 [2021-10-04 19:13:37,029 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 [2021-10-04 19:13:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-04 19:13:37,284 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 [2021-10-04 19:13:37,939 INFO L354 Elim1Store]: treesize reduction 20, result has 81.0 percent of original size [2021-10-04 19:13:37,940 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 [2021-10-04 19:13:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:38,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997824830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:38,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:13:38,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-04 19:13:38,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314739143] [2021-10-04 19:13:38,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:13:38,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:13:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:13:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:13:38,429 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) [2021-10-04 19:13:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:13:42,353 INFO L93 Difference]: Finished difference Result 5496 states and 23083 transitions. [2021-10-04 19:13:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:13:42,355 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 [2021-10-04 19:13:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:13:42,371 INFO L225 Difference]: With dead ends: 5496 [2021-10-04 19:13:42,371 INFO L226 Difference]: Without dead ends: 5473 [2021-10-04 19:13:42,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 3076.9ms TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2021-10-04 19:13:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-10-04 19:13:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 3269. [2021-10-04 19:13:42,449 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) [2021-10-04 19:13:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 13790 transitions. [2021-10-04 19:13:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 13790 transitions. Word has length 35 [2021-10-04 19:13:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:13:42,460 INFO L470 AbstractCegarLoop]: Abstraction has 3269 states and 13790 transitions. [2021-10-04 19:13:42,461 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) [2021-10-04 19:13:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 13790 transitions. [2021-10-04 19:13:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:13:42,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:13:42,469 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] [2021-10-04 19:13:42,501 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 [2021-10-04 19:13:42,670 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 [2021-10-04 19:13:42,671 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)] === [2021-10-04 19:13:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:13:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1804994682, now seen corresponding path program 22 times [2021-10-04 19:13:42,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:13:42,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351261198] [2021-10-04 19:13:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:13:42,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:13:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:13:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:13:44,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:13:44,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351261198] [2021-10-04 19:13:44,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351261198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:44,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674784354] [2021-10-04 19:13:44,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:13:44,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:13:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:13:44,599 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) [2021-10-04 19:13:44,600 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 [2021-10-04 19:13:46,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:13:46,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:13:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-04 19:13:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:13:46,962 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 [2021-10-04 19:13:48,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:13:48,105 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-10-04 19:13:48,106 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 [2021-10-04 19:13:48,754 INFO L354 Elim1Store]: treesize reduction 69, result has 30.3 percent of original size [2021-10-04 19:13:48,754 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 [2021-10-04 19:13:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:13:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674784354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:13:48,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:13:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-04 19:13:48,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726350571] [2021-10-04 19:13:48,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:13:48,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:13:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:13:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:13:48,859 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) [2021-10-04 19:14:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:14:03,256 INFO L93 Difference]: Finished difference Result 6609 states and 28000 transitions. [2021-10-04 19:14:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-04 19:14:03,257 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 [2021-10-04 19:14:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:14:03,277 INFO L225 Difference]: With dead ends: 6609 [2021-10-04 19:14:03,278 INFO L226 Difference]: Without dead ends: 6586 [2021-10-04 19:14:03,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 11367.8ms TimeCoverageRelationStatistics Valid=731, Invalid=5431, Unknown=0, NotChecked=0, Total=6162 [2021-10-04 19:14:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-10-04 19:14:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 3399. [2021-10-04 19:14:03,407 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) [2021-10-04 19:14:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 14453 transitions. [2021-10-04 19:14:03,424 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 14453 transitions. Word has length 35 [2021-10-04 19:14:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:14:03,425 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 14453 transitions. [2021-10-04 19:14:03,425 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) [2021-10-04 19:14:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 14453 transitions. [2021-10-04 19:14:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:14:03,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:14:03,437 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] [2021-10-04 19:14:03,482 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 [2021-10-04 19:14:03,652 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 [2021-10-04 19:14:03,653 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)] === [2021-10-04 19:14:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:14:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1466478110, now seen corresponding path program 23 times [2021-10-04 19:14:03,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:14:03,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458744415] [2021-10-04 19:14:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:14:03,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:14:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:14:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:14:06,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:14:06,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458744415] [2021-10-04 19:14:06,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458744415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:06,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838143630] [2021-10-04 19:14:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:14:06,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:14:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:14:06,203 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) [2021-10-04 19:14:06,204 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 [2021-10-04 19:14:08,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 19:14:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:14:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-04 19:14:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:14:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:08,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:08,676 INFO L354 Elim1Store]: treesize reduction 189, result has 16.4 percent of original size [2021-10-04 19:14:08,677 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 [2021-10-04 19:14:08,919 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 [2021-10-04 19:14:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,219 INFO L354 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2021-10-04 19:14:09,221 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 [2021-10-04 19:14:09,495 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 [2021-10-04 19:14:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:14:09,888 INFO L354 Elim1Store]: treesize reduction 68, result has 47.3 percent of original size [2021-10-04 19:14:09,889 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 [2021-10-04 19:14:10,219 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 [2021-10-04 19:14:10,337 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 [2021-10-04 19:14:11,854 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 [2021-10-04 19:14:13,013 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 [2021-10-04 19:14:14,617 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-10-04 19:14:14,618 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 [2021-10-04 19:14:15,278 INFO L354 Elim1Store]: treesize reduction 81, result has 12.9 percent of original size [2021-10-04 19:14:15,278 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 [2021-10-04 19:14:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:14:15,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838143630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:15,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:14:15,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-04 19:14:15,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406356458] [2021-10-04 19:14:15,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-04 19:14:15,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:14:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-04 19:14:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:14:15,374 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) [2021-10-04 19:14:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:14:28,575 INFO L93 Difference]: Finished difference Result 5221 states and 22086 transitions. [2021-10-04 19:14:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:14:28,576 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 [2021-10-04 19:14:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:14:28,591 INFO L225 Difference]: With dead ends: 5221 [2021-10-04 19:14:28,592 INFO L226 Difference]: Without dead ends: 5198 [2021-10-04 19:14:28,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 6771.1ms TimeCoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2021-10-04 19:14:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-10-04 19:14:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 3558. [2021-10-04 19:14:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3557 states have (on average 4.26314309811639) internal successors, (15164), 3557 states have internal predecessors, (15164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:14:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 15164 transitions. [2021-10-04 19:14:28,680 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 15164 transitions. Word has length 35 [2021-10-04 19:14:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:14:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 3558 states and 15164 transitions. [2021-10-04 19:14:28,681 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) [2021-10-04 19:14:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 15164 transitions. [2021-10-04 19:14:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:14:28,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:14:28,689 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] [2021-10-04 19:14:28,721 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 [2021-10-04 19:14:28,890 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 [2021-10-04 19:14:28,891 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)] === [2021-10-04 19:14:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:14:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1227485964, now seen corresponding path program 24 times [2021-10-04 19:14:28,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:14:28,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586345108] [2021-10-04 19:14:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:14:28,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:14:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:14:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:14:30,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:14:30,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586345108] [2021-10-04 19:14:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586345108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:30,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306567943] [2021-10-04 19:14:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:14:30,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:14:30,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:14:30,336 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) [2021-10-04 19:14:30,338 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 [2021-10-04 19:14:32,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:14:32,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:14:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-04 19:14:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:14:34,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:14:34,461 INFO L354 Elim1Store]: treesize reduction 112, result has 29.1 percent of original size [2021-10-04 19:14:34,462 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 [2021-10-04 19:14:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:14:34,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306567943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:34,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:14:34,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-04 19:14:34,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740480881] [2021-10-04 19:14:34,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-04 19:14:34,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:14:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-04 19:14:34,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:14:34,737 INFO L87 Difference]: Start difference. First operand 3558 states and 15164 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) [2021-10-04 19:14:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:14:37,190 INFO L93 Difference]: Finished difference Result 5417 states and 22931 transitions. [2021-10-04 19:14:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 19:14:37,191 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 [2021-10-04 19:14:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:14:37,207 INFO L225 Difference]: With dead ends: 5417 [2021-10-04 19:14:37,207 INFO L226 Difference]: Without dead ends: 5394 [2021-10-04 19:14:37,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2000.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-10-04 19:14:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2021-10-04 19:14:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 3548. [2021-10-04 19:14:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3547 states have (on average 4.26219340287567) internal successors, (15118), 3547 states have internal predecessors, (15118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:14:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 15118 transitions. [2021-10-04 19:14:37,300 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 15118 transitions. Word has length 35 [2021-10-04 19:14:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:14:37,300 INFO L470 AbstractCegarLoop]: Abstraction has 3548 states and 15118 transitions. [2021-10-04 19:14:37,301 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) [2021-10-04 19:14:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 15118 transitions. [2021-10-04 19:14:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:14:37,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:14:37,308 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] [2021-10-04 19:14:37,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-04 19:14:37,509 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 [2021-10-04 19:14:37,509 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)] === [2021-10-04 19:14:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:14:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash 400981252, now seen corresponding path program 25 times [2021-10-04 19:14:37,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:14:37,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738200607] [2021-10-04 19:14:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:14:37,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:14:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:14:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:14:40,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:14:40,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738200607] [2021-10-04 19:14:40,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738200607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:40,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496815666] [2021-10-04 19:14:40,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:14:40,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:14:40,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:14:40,047 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) [2021-10-04 19:14:40,048 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 [2021-10-04 19:14:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:14:42,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-04 19:14:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:14:42,726 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 [2021-10-04 19:14:43,028 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 [2021-10-04 19:14:43,170 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 [2021-10-04 19:14:43,409 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:14:43,410 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 [2021-10-04 19:14:43,635 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 [2021-10-04 19:14:43,720 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 [2021-10-04 19:14:44,069 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 [2021-10-04 19:14:44,374 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 46 treesize of output 42 [2021-10-04 19:14:45,001 INFO L354 Elim1Store]: treesize reduction 148, result has 16.9 percent of original size [2021-10-04 19:14:45,002 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 69 [2021-10-04 19:14:45,410 INFO L354 Elim1Store]: treesize reduction 14, result has 71.4 percent of original size [2021-10-04 19:14:45,410 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 60 [2021-10-04 19:14:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:14:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496815666] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:45,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:14:45,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-10-04 19:14:45,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519021982] [2021-10-04 19:14:45,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-04 19:14:45,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:14:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-04 19:14:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:14:45,531 INFO L87 Difference]: Start difference. First operand 3548 states and 15118 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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) [2021-10-04 19:14:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:14:50,847 INFO L93 Difference]: Finished difference Result 4837 states and 20473 transitions. [2021-10-04 19:14:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:14:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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 [2021-10-04 19:14:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:14:50,862 INFO L225 Difference]: With dead ends: 4837 [2021-10-04 19:14:50,862 INFO L226 Difference]: Without dead ends: 4814 [2021-10-04 19:14:50,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 5366.7ms TimeCoverageRelationStatistics Valid=248, Invalid=2008, Unknown=0, NotChecked=0, Total=2256 [2021-10-04 19:14:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-10-04 19:14:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 3447. [2021-10-04 19:14:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 4.253337202553685) internal successors, (14657), 3446 states have internal predecessors, (14657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:14:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 14657 transitions. [2021-10-04 19:14:50,948 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 14657 transitions. Word has length 35 [2021-10-04 19:14:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:14:50,948 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 14657 transitions. [2021-10-04 19:14:50,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 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) [2021-10-04 19:14:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 14657 transitions. [2021-10-04 19:14:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:14:50,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:14:50,959 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] [2021-10-04 19:14:50,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-04 19:14:51,173 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 [2021-10-04 19:14:51,174 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)] === [2021-10-04 19:14:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:14:51,175 INFO L82 PathProgramCache]: Analyzing trace with hash 156681448, now seen corresponding path program 26 times [2021-10-04 19:14:51,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:14:51,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234119408] [2021-10-04 19:14:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:14:51,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:14:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:14:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:14:53,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:14:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234119408] [2021-10-04 19:14:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234119408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670606056] [2021-10-04 19:14:53,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:14:53,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:14:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:14:53,912 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) [2021-10-04 19:14:53,913 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 [2021-10-04 19:14:56,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:14:56,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:14:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-04 19:14:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:14:56,750 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 209 treesize of output 193 [2021-10-04 19:14:57,530 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-04 19:14:57,530 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 [2021-10-04 19:14:57,952 INFO L354 Elim1Store]: treesize reduction 14, result has 71.4 percent of original size [2021-10-04 19:14:57,953 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 [2021-10-04 19:14:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:14:58,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670606056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:14:58,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:14:58,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-10-04 19:14:58,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082507324] [2021-10-04 19:14:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:14:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:14:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:14:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:14:58,076 INFO L87 Difference]: Start difference. First operand 3447 states and 14657 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) [2021-10-04 19:15:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:15:02,111 INFO L93 Difference]: Finished difference Result 4822 states and 20285 transitions. [2021-10-04 19:15:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:15:02,112 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 [2021-10-04 19:15:02,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:15:02,126 INFO L225 Difference]: With dead ends: 4822 [2021-10-04 19:15:02,126 INFO L226 Difference]: Without dead ends: 4799 [2021-10-04 19:15:02,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4065.3ms TimeCoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2021-10-04 19:15:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2021-10-04 19:15:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 3449. [2021-10-04 19:15:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 4.253190255220417) internal successors, (14665), 3448 states have internal predecessors, (14665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:15:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 14665 transitions. [2021-10-04 19:15:02,302 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 14665 transitions. Word has length 35 [2021-10-04 19:15:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:15:02,302 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 14665 transitions. [2021-10-04 19:15:02,302 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) [2021-10-04 19:15:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 14665 transitions. [2021-10-04 19:15:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:15:02,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:15:02,312 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] [2021-10-04 19:15:02,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-04 19:15:02,517 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 [2021-10-04 19:15:02,518 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)] === [2021-10-04 19:15:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:15:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 152960514, now seen corresponding path program 27 times [2021-10-04 19:15:02,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:15:02,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398182293] [2021-10-04 19:15:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:15:02,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:15:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:15:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:15:04,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:15:04,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398182293] [2021-10-04 19:15:04,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398182293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:04,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132722138] [2021-10-04 19:15:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:15:04,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:15:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:15:04,651 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) [2021-10-04 19:15:04,652 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 [2021-10-04 19:15:07,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:15:07,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:15:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-04 19:15:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:15:09,260 INFO L354 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2021-10-04 19:15:09,261 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 [2021-10-04 19:15:09,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:15:09,441 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 [2021-10-04 19:15:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:15:09,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132722138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:09,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:15:09,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-10-04 19:15:09,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093021976] [2021-10-04 19:15:09,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:15:09,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:15:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:15:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:15:09,630 INFO L87 Difference]: Start difference. First operand 3449 states and 14665 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) [2021-10-04 19:15:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:15:15,911 INFO L93 Difference]: Finished difference Result 6037 states and 25529 transitions. [2021-10-04 19:15:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:15:15,912 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 [2021-10-04 19:15:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:15:15,936 INFO L225 Difference]: With dead ends: 6037 [2021-10-04 19:15:15,937 INFO L226 Difference]: Without dead ends: 6014 [2021-10-04 19:15:15,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3587.8ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-10-04 19:15:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2021-10-04 19:15:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 3454. [2021-10-04 19:15:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 4.252534028381118) internal successors, (14684), 3453 states have internal predecessors, (14684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:15:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 14684 transitions. [2021-10-04 19:15:16,047 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 14684 transitions. Word has length 35 [2021-10-04 19:15:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:15:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 14684 transitions. [2021-10-04 19:15:16,047 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) [2021-10-04 19:15:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 14684 transitions. [2021-10-04 19:15:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:15:16,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:15:16,058 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] [2021-10-04 19:15:16,102 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 [2021-10-04 19:15:16,272 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 [2021-10-04 19:15:16,273 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)] === [2021-10-04 19:15:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:15:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash -698331048, now seen corresponding path program 28 times [2021-10-04 19:15:16,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:15:16,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91799252] [2021-10-04 19:15:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:15:16,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:15:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:15:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:15:18,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:15:18,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91799252] [2021-10-04 19:15:18,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91799252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:18,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813617641] [2021-10-04 19:15:18,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:15:18,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:15:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:15:18,747 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) [2021-10-04 19:15:18,748 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 [2021-10-04 19:15:21,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:15:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:15:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-04 19:15:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:15:22,374 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 [2021-10-04 19:15:22,604 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 [2021-10-04 19:15:22,801 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 [2021-10-04 19:15:22,969 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 [2021-10-04 19:15:23,722 INFO L354 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2021-10-04 19:15:23,722 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 [2021-10-04 19:15:24,032 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-10-04 19:15:24,033 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 49 treesize of output 45 [2021-10-04 19:15:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:15:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813617641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:24,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:15:24,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-10-04 19:15:24,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604060971] [2021-10-04 19:15:24,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-04 19:15:24,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:15:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-04 19:15:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:15:24,343 INFO L87 Difference]: Start difference. First operand 3454 states and 14684 transitions. Second operand has 36 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 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) [2021-10-04 19:15:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:15:29,765 INFO L93 Difference]: Finished difference Result 4794 states and 19903 transitions. [2021-10-04 19:15:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:15:29,766 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 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 [2021-10-04 19:15:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:15:29,780 INFO L225 Difference]: With dead ends: 4794 [2021-10-04 19:15:29,780 INFO L226 Difference]: Without dead ends: 4748 [2021-10-04 19:15:29,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 5153.3ms TimeCoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2021-10-04 19:15:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-10-04 19:15:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3497. [2021-10-04 19:15:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 4.250858123569794) internal successors, (14861), 3496 states have internal predecessors, (14861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:15:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 14861 transitions. [2021-10-04 19:15:29,860 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 14861 transitions. Word has length 35 [2021-10-04 19:15:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:15:29,860 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 14861 transitions. [2021-10-04 19:15:29,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 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) [2021-10-04 19:15:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 14861 transitions. [2021-10-04 19:15:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:15:29,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:15:29,868 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] [2021-10-04 19:15:29,902 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 [2021-10-04 19:15:30,068 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 [2021-10-04 19:15:30,070 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)] === [2021-10-04 19:15:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:15:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1423225132, now seen corresponding path program 29 times [2021-10-04 19:15:30,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:15:30,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075766924] [2021-10-04 19:15:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:15:30,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:15:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:15:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:15:32,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:15:32,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075766924] [2021-10-04 19:15:32,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075766924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:32,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073161622] [2021-10-04 19:15:32,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:15:32,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:15:32,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:15:32,433 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) [2021-10-04 19:15:32,434 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 [2021-10-04 19:15:35,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:15:35,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:15:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-04 19:15:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:15:36,281 INFO L354 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2021-10-04 19:15:36,282 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 [2021-10-04 19:15:36,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:15:36,462 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 [2021-10-04 19:15:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:15:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073161622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:36,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:15:36,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 23 [2021-10-04 19:15:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422726363] [2021-10-04 19:15:36,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-04 19:15:36,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:15:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-04 19:15:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:15:36,555 INFO L87 Difference]: Start difference. First operand 3497 states and 14861 transitions. Second operand has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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) [2021-10-04 19:15:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:15:38,582 INFO L93 Difference]: Finished difference Result 5081 states and 21324 transitions. [2021-10-04 19:15:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:15:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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 [2021-10-04 19:15:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:15:38,600 INFO L225 Difference]: With dead ends: 5081 [2021-10-04 19:15:38,600 INFO L226 Difference]: Without dead ends: 5058 [2021-10-04 19:15:38,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2135.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:15:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2021-10-04 19:15:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 3459. [2021-10-04 19:15:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 4.2518796992481205) internal successors, (14703), 3458 states have internal predecessors, (14703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:15:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 14703 transitions. [2021-10-04 19:15:38,763 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 14703 transitions. Word has length 35 [2021-10-04 19:15:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:15:38,763 INFO L470 AbstractCegarLoop]: Abstraction has 3459 states and 14703 transitions. [2021-10-04 19:15:38,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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) [2021-10-04 19:15:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 14703 transitions. [2021-10-04 19:15:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:15:38,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:15:38,771 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] [2021-10-04 19:15:38,806 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 [2021-10-04 19:15:38,972 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 [2021-10-04 19:15:38,973 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)] === [2021-10-04 19:15:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:15:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1241978442, now seen corresponding path program 30 times [2021-10-04 19:15:38,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:15:38,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668678154] [2021-10-04 19:15:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:15:38,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:15:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:15:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:15:41,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:15:41,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668678154] [2021-10-04 19:15:41,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668678154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:41,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271302365] [2021-10-04 19:15:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:15:41,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:15:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:15:41,450 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) [2021-10-04 19:15:41,453 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 [2021-10-04 19:15:44,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-04 19:15:44,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:15:44,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-04 19:15:44,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:15:44,516 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 75 treesize of output 71 [2021-10-04 19:15:45,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:15:45,676 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-04 19:15:45,676 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 53 treesize of output 62 [2021-10-04 19:15:46,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:15:46,040 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 [2021-10-04 19:15:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:15:46,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271302365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:46,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:15:46,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 25 [2021-10-04 19:15:46,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69333917] [2021-10-04 19:15:46,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-04 19:15:46,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:15:46,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-04 19:15:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:15:46,098 INFO L87 Difference]: Start difference. First operand 3459 states and 14703 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) [2021-10-04 19:15:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:15:48,805 INFO L93 Difference]: Finished difference Result 5193 states and 21942 transitions. [2021-10-04 19:15:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:15:48,806 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 [2021-10-04 19:15:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:15:48,822 INFO L225 Difference]: With dead ends: 5193 [2021-10-04 19:15:48,822 INFO L226 Difference]: Without dead ends: 5170 [2021-10-04 19:15:48,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2639.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-10-04 19:15:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2021-10-04 19:15:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 3702. [2021-10-04 19:15:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 4.241015941637396) internal successors, (15696), 3701 states have internal predecessors, (15696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:15:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 15696 transitions. [2021-10-04 19:15:48,909 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 15696 transitions. Word has length 35 [2021-10-04 19:15:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:15:48,910 INFO L470 AbstractCegarLoop]: Abstraction has 3702 states and 15696 transitions. [2021-10-04 19:15:48,910 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) [2021-10-04 19:15:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 15696 transitions. [2021-10-04 19:15:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:15:48,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:15:48,918 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] [2021-10-04 19:15:48,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-04 19:15:49,119 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 [2021-10-04 19:15:49,119 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)] === [2021-10-04 19:15:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:15:49,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1431171270, now seen corresponding path program 31 times [2021-10-04 19:15:49,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:15:49,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305655488] [2021-10-04 19:15:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:15:49,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:15:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:15:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:15:50,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:15:50,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305655488] [2021-10-04 19:15:50,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305655488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:50,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773964654] [2021-10-04 19:15:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:15:50,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:15:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:15:50,562 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) [2021-10-04 19:15:50,563 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 [2021-10-04 19:15:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:15:53,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-04 19:15:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:15:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:53,746 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-04 19:15:53,746 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 [2021-10-04 19:15:53,973 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 11 treesize of output 7 [2021-10-04 19:15:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,271 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-04 19:15:54,271 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 [2021-10-04 19:15:54,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-04 19:15:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:15:55,064 INFO L354 Elim1Store]: treesize reduction 120, result has 37.8 percent of original size [2021-10-04 19:15:55,065 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 87 treesize of output 143 [2021-10-04 19:15:55,744 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 166 treesize of output 162 [2021-10-04 19:15:56,017 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 62 treesize of output 58 [2021-10-04 19:15:56,350 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 52 treesize of output 48 [2021-10-04 19:15:56,620 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 42 treesize of output 38 [2021-10-04 19:15:57,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:15:57,485 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-04 19:15:57,485 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 73 [2021-10-04 19:15:57,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:15:57,961 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 61 treesize of output 51 [2021-10-04 19:15:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:15:58,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773964654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:15:58,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:15:58,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-04 19:15:58,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258562578] [2021-10-04 19:15:58,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:15:58,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:15:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:15:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:15:58,093 INFO L87 Difference]: Start difference. First operand 3702 states and 15696 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) [2021-10-04 19:16:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:16:01,677 INFO L93 Difference]: Finished difference Result 5806 states and 24479 transitions. [2021-10-04 19:16:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-04 19:16:01,678 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 [2021-10-04 19:16:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:16:01,697 INFO L225 Difference]: With dead ends: 5806 [2021-10-04 19:16:01,697 INFO L226 Difference]: Without dead ends: 5783 [2021-10-04 19:16:01,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3711.9ms TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:16:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-10-04 19:16:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 3747. [2021-10-04 19:16:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.2341163908168715) internal successors, (15861), 3746 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:16:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15861 transitions. [2021-10-04 19:16:01,794 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15861 transitions. Word has length 35 [2021-10-04 19:16:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:16:01,794 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 15861 transitions. [2021-10-04 19:16:01,795 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) [2021-10-04 19:16:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15861 transitions. [2021-10-04 19:16:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:16:01,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:16:01,804 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] [2021-10-04 19:16:01,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-04 19:16:02,004 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 [2021-10-04 19:16:02,005 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)] === [2021-10-04 19:16:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:16:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 87714488, now seen corresponding path program 32 times [2021-10-04 19:16:02,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:16:02,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861149208] [2021-10-04 19:16:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:16:02,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:16:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:16:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:16:03,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:16:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861149208] [2021-10-04 19:16:03,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861149208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792792320] [2021-10-04 19:16:03,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:16:03,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:16:03,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:16:03,834 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) [2021-10-04 19:16:03,835 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 [2021-10-04 19:16:07,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:16:07,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:16:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-04 19:16:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:16:08,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:16:08,455 INFO L354 Elim1Store]: treesize reduction 120, result has 29.4 percent of original size [2021-10-04 19:16:08,456 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 [2021-10-04 19:16:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:16:08,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792792320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:08,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:16:08,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-10-04 19:16:08,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471251664] [2021-10-04 19:16:08,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:16:08,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:16:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:16:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:16:08,724 INFO L87 Difference]: Start difference. First operand 3747 states and 15861 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2021-10-04 19:16:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:16:13,243 INFO L93 Difference]: Finished difference Result 6248 states and 26294 transitions. [2021-10-04 19:16:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:16:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 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 [2021-10-04 19:16:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:16:13,262 INFO L225 Difference]: With dead ends: 6248 [2021-10-04 19:16:13,263 INFO L226 Difference]: Without dead ends: 6225 [2021-10-04 19:16:13,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2233.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2021-10-04 19:16:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2021-10-04 19:16:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 3658. [2021-10-04 19:16:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3657 states have (on average 4.2368061252392675) internal successors, (15494), 3657 states have internal predecessors, (15494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:16:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 15494 transitions. [2021-10-04 19:16:13,358 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 15494 transitions. Word has length 35 [2021-10-04 19:16:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:16:13,358 INFO L470 AbstractCegarLoop]: Abstraction has 3658 states and 15494 transitions. [2021-10-04 19:16:13,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2021-10-04 19:16:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 15494 transitions. [2021-10-04 19:16:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:16:13,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:16:13,366 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] [2021-10-04 19:16:13,403 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 [2021-10-04 19:16:13,568 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 [2021-10-04 19:16:13,569 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)] === [2021-10-04 19:16:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:16:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1967388272, now seen corresponding path program 33 times [2021-10-04 19:16:13,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:16:13,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579651663] [2021-10-04 19:16:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:16:13,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:16:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:16:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:16:16,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:16:16,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579651663] [2021-10-04 19:16:16,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579651663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:16,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161523181] [2021-10-04 19:16:16,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:16:16,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:16:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:16:16,006 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) [2021-10-04 19:16:16,007 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 [2021-10-04 19:16:19,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:16:19,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:16:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-04 19:16:19,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:16:19,307 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 397 treesize of output 365 [2021-10-04 19:16:19,642 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 [2021-10-04 19:16:19,770 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 [2021-10-04 19:16:19,982 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:16:19,982 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 [2021-10-04 19:16:20,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-04 19:16:20,332 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 [2021-10-04 19:16:20,543 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 [2021-10-04 19:16:20,777 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 [2021-10-04 19:16:21,217 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:16:21,217 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 41 treesize of output 43 [2021-10-04 19:16:22,727 INFO L354 Elim1Store]: treesize reduction 33, result has 37.7 percent of original size [2021-10-04 19:16:22,727 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 70 treesize of output 50 [2021-10-04 19:16:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:16:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161523181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:22,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:16:22,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2021-10-04 19:16:22,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681149493] [2021-10-04 19:16:22,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-04 19:16:22,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:16:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-04 19:16:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:16:22,796 INFO L87 Difference]: Start difference. First operand 3658 states and 15494 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) [2021-10-04 19:16:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:16:30,126 INFO L93 Difference]: Finished difference Result 5450 states and 23003 transitions. [2021-10-04 19:16:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 19:16:30,126 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 [2021-10-04 19:16:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:16:30,143 INFO L225 Difference]: With dead ends: 5450 [2021-10-04 19:16:30,143 INFO L226 Difference]: Without dead ends: 5427 [2021-10-04 19:16:30,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 5433.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1695, Unknown=0, NotChecked=0, Total=1892 [2021-10-04 19:16:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2021-10-04 19:16:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 3658. [2021-10-04 19:16:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3657 states have (on average 4.2368061252392675) internal successors, (15494), 3657 states have internal predecessors, (15494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:16:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 15494 transitions. [2021-10-04 19:16:30,239 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 15494 transitions. Word has length 35 [2021-10-04 19:16:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:16:30,239 INFO L470 AbstractCegarLoop]: Abstraction has 3658 states and 15494 transitions. [2021-10-04 19:16:30,239 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) [2021-10-04 19:16:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 15494 transitions. [2021-10-04 19:16:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:16:30,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:16:30,248 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] [2021-10-04 19:16:30,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-04 19:16:30,461 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 [2021-10-04 19:16:30,462 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)] === [2021-10-04 19:16:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:16:30,463 INFO L82 PathProgramCache]: Analyzing trace with hash 993770884, now seen corresponding path program 34 times [2021-10-04 19:16:30,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:16:30,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891894815] [2021-10-04 19:16:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:16:30,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:16:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:16:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:16:34,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:16:34,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891894815] [2021-10-04 19:16:34,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891894815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:34,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899024973] [2021-10-04 19:16:34,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:16:34,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:16:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:16:34,210 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) [2021-10-04 19:16:34,211 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 [2021-10-04 19:16:37,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:16:37,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:16:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-04 19:16:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:16:37,561 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 197 treesize of output 181 [2021-10-04 19:16:38,398 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 [2021-10-04 19:16:38,584 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 [2021-10-04 19:16:38,811 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 [2021-10-04 19:16:39,041 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 [2021-10-04 19:16:39,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:16:39,451 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-04 19:16:39,451 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 [2021-10-04 19:16:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:16:40,307 INFO L354 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2021-10-04 19:16:40,308 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 [2021-10-04 19:16:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:16:40,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899024973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:40,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:16:40,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-10-04 19:16:40,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950937904] [2021-10-04 19:16:40,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-04 19:16:40,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:16:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-04 19:16:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-10-04 19:16:40,459 INFO L87 Difference]: Start difference. First operand 3658 states and 15494 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 33 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) [2021-10-04 19:16:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:16:45,612 INFO L93 Difference]: Finished difference Result 5966 states and 24653 transitions. [2021-10-04 19:16:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-04 19:16:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 33 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 [2021-10-04 19:16:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:16:45,630 INFO L225 Difference]: With dead ends: 5966 [2021-10-04 19:16:45,630 INFO L226 Difference]: Without dead ends: 5926 [2021-10-04 19:16:45,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 5759.1ms TimeCoverageRelationStatistics Valid=259, Invalid=2291, Unknown=0, NotChecked=0, Total=2550 [2021-10-04 19:16:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-10-04 19:16:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4301. [2021-10-04 19:16:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4301 states, 4300 states have (on average 4.225813953488372) internal successors, (18171), 4300 states have internal predecessors, (18171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:16:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 18171 transitions. [2021-10-04 19:16:45,774 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 18171 transitions. Word has length 35 [2021-10-04 19:16:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:16:45,774 INFO L470 AbstractCegarLoop]: Abstraction has 4301 states and 18171 transitions. [2021-10-04 19:16:45,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 33 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) [2021-10-04 19:16:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 18171 transitions. [2021-10-04 19:16:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:16:45,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:16:45,784 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] [2021-10-04 19:16:45,823 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 [2021-10-04 19:16:45,986 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 [2021-10-04 19:16:45,987 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)] === [2021-10-04 19:16:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:16:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -86320218, now seen corresponding path program 35 times [2021-10-04 19:16:45,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:16:45,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478475910] [2021-10-04 19:16:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:16:45,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:16:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:16:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:16:48,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:16:48,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478475910] [2021-10-04 19:16:48,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478475910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:48,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656774943] [2021-10-04 19:16:48,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:16:48,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:16:48,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:16:48,733 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) [2021-10-04 19:16:48,734 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 [2021-10-04 19:16:52,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 19:16:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:16:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-04 19:16:52,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:16:52,190 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 235 treesize of output 219 [2021-10-04 19:16:52,933 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:16:52,934 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 [2021-10-04 19:16:53,319 INFO L354 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2021-10-04 19:16:53,320 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 [2021-10-04 19:16:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:16:53,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656774943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:53,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:16:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-10-04 19:16:53,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932860558] [2021-10-04 19:16:53,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:16:53,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:16:53,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:16:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:16:53,411 INFO L87 Difference]: Start difference. First operand 4301 states and 18171 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2021-10-04 19:16:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:16:56,532 INFO L93 Difference]: Finished difference Result 6220 states and 26091 transitions. [2021-10-04 19:16:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:16:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 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 [2021-10-04 19:16:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:16:56,550 INFO L225 Difference]: With dead ends: 6220 [2021-10-04 19:16:56,550 INFO L226 Difference]: Without dead ends: 6197 [2021-10-04 19:16:56,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3152.9ms TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:16:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6197 states. [2021-10-04 19:16:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6197 to 4358. [2021-10-04 19:16:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 4357 states have (on average 4.223548313059444) internal successors, (18402), 4357 states have internal predecessors, (18402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:16:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 18402 transitions. [2021-10-04 19:16:56,668 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 18402 transitions. Word has length 35 [2021-10-04 19:16:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:16:56,669 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 18402 transitions. [2021-10-04 19:16:56,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 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) [2021-10-04 19:16:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 18402 transitions. [2021-10-04 19:16:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:16:56,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:16:56,681 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] [2021-10-04 19:16:56,735 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 [2021-10-04 19:16:56,895 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 [2021-10-04 19:16:56,896 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)] === [2021-10-04 19:16:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:16:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash 627273854, now seen corresponding path program 36 times [2021-10-04 19:16:56,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:16:56,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542478541] [2021-10-04 19:16:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:16:56,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:16:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:16:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:16:58,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:16:58,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542478541] [2021-10-04 19:16:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542478541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:16:58,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969593986] [2021-10-04 19:16:58,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:16:58,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:16:58,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:16:58,603 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) [2021-10-04 19:16:58,605 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 [2021-10-04 19:17:02,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:17:02,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:17:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-04 19:17:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:17:03,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:17:03,860 INFO L354 Elim1Store]: treesize reduction 112, result has 29.1 percent of original size [2021-10-04 19:17:03,861 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 [2021-10-04 19:17:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:17:04,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969593986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:04,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:17:04,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-04 19:17:04,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836018857] [2021-10-04 19:17:04,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-04 19:17:04,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:17:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-04 19:17:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:17:04,161 INFO L87 Difference]: Start difference. First operand 4358 states and 18402 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2021-10-04 19:17:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:17:07,238 INFO L93 Difference]: Finished difference Result 6792 states and 28568 transitions. [2021-10-04 19:17:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:17:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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 [2021-10-04 19:17:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:17:07,261 INFO L225 Difference]: With dead ends: 6792 [2021-10-04 19:17:07,261 INFO L226 Difference]: Without dead ends: 6769 [2021-10-04 19:17:07,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2176.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2021-10-04 19:17:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2021-10-04 19:17:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 4363. [2021-10-04 19:17:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 4.2230628152223755) internal successors, (18421), 4362 states have internal predecessors, (18421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:17:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 18421 transitions. [2021-10-04 19:17:07,388 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 18421 transitions. Word has length 35 [2021-10-04 19:17:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:17:07,388 INFO L470 AbstractCegarLoop]: Abstraction has 4363 states and 18421 transitions. [2021-10-04 19:17:07,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 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) [2021-10-04 19:17:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 18421 transitions. [2021-10-04 19:17:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:17:07,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:17:07,398 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] [2021-10-04 19:17:07,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-04 19:17:07,599 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 [2021-10-04 19:17:07,599 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)] === [2021-10-04 19:17:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:17:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash 738360168, now seen corresponding path program 37 times [2021-10-04 19:17:07,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:17:07,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346617967] [2021-10-04 19:17:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:17:07,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:17:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:17:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:17:10,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:17:10,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346617967] [2021-10-04 19:17:10,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346617967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:10,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069662206] [2021-10-04 19:17:10,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:17:10,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:17:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:17:10,557 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) [2021-10-04 19:17:10,559 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 [2021-10-04 19:17:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:17:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-04 19:17:14,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:17:15,704 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-04 19:17:15,704 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 [2021-10-04 19:17:15,932 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-04 19:17:15,932 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 [2021-10-04 19:17:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:17:16,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069662206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:16,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:17:16,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-10-04 19:17:16,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464242631] [2021-10-04 19:17:16,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:17:16,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:17:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:17:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:17:16,092 INFO L87 Difference]: Start difference. First operand 4363 states and 18421 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) [2021-10-04 19:17:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:17:19,655 INFO L93 Difference]: Finished difference Result 6556 states and 27529 transitions. [2021-10-04 19:17:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 19:17:19,656 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 [2021-10-04 19:17:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:17:19,675 INFO L225 Difference]: With dead ends: 6556 [2021-10-04 19:17:19,676 INFO L226 Difference]: Without dead ends: 6533 [2021-10-04 19:17:19,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3611.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-10-04 19:17:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2021-10-04 19:17:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 4360. [2021-10-04 19:17:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 4.223904565267263) internal successors, (18412), 4359 states have internal predecessors, (18412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:17:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 18412 transitions. [2021-10-04 19:17:19,791 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 18412 transitions. Word has length 35 [2021-10-04 19:17:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:17:19,791 INFO L470 AbstractCegarLoop]: Abstraction has 4360 states and 18412 transitions. [2021-10-04 19:17:19,791 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) [2021-10-04 19:17:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 18412 transitions. [2021-10-04 19:17:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:17:19,800 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:17:19,800 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] [2021-10-04 19:17:19,841 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 [2021-10-04 19:17:20,001 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 [2021-10-04 19:17:20,002 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)] === [2021-10-04 19:17:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:17:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -794258592, now seen corresponding path program 38 times [2021-10-04 19:17:20,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:17:20,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141183688] [2021-10-04 19:17:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:17:20,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:17:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:17:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:17:21,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:17:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141183688] [2021-10-04 19:17:21,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141183688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:21,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781970622] [2021-10-04 19:17:21,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:17:21,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:17:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:17:21,637 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) [2021-10-04 19:17:21,639 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 [2021-10-04 19:17:25,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:17:25,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:17:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-04 19:17:25,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:17:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:25,696 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-04 19:17:25,697 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 [2021-10-04 19:17:25,945 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 [2021-10-04 19:17:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,230 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-04 19:17:26,231 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 [2021-10-04 19:17:26,538 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 [2021-10-04 19:17:26,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:17:26,999 INFO L354 Elim1Store]: treesize reduction 80, result has 47.7 percent of original size [2021-10-04 19:17:27,001 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 [2021-10-04 19:17:27,338 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 [2021-10-04 19:17:27,539 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 [2021-10-04 19:17:27,763 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 22 treesize of output 18 [2021-10-04 19:17:28,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:17:28,573 INFO L354 Elim1Store]: treesize reduction 112, result has 25.3 percent of original size [2021-10-04 19:17:28,574 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 54 treesize of output 63 [2021-10-04 19:17:28,829 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-04 19:17:28,830 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 43 treesize of output 45 [2021-10-04 19:17:29,641 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-04 19:17:29,641 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 55 treesize of output 27 [2021-10-04 19:17:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:17:29,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781970622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:29,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:17:29,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-04 19:17:29,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848943486] [2021-10-04 19:17:29,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:17:29,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:17:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:17:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:17:29,698 INFO L87 Difference]: Start difference. First operand 4360 states and 18412 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) [2021-10-04 19:17:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:17:33,916 INFO L93 Difference]: Finished difference Result 6077 states and 25433 transitions. [2021-10-04 19:17:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:17:33,917 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 [2021-10-04 19:17:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:17:33,934 INFO L225 Difference]: With dead ends: 6077 [2021-10-04 19:17:33,935 INFO L226 Difference]: Without dead ends: 6031 [2021-10-04 19:17:33,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 4267.2ms TimeCoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2021-10-04 19:17:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-10-04 19:17:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 4377. [2021-10-04 19:17:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.217550274223035) internal successors, (18456), 4376 states have internal predecessors, (18456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:17:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 18456 transitions. [2021-10-04 19:17:34,038 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 18456 transitions. Word has length 35 [2021-10-04 19:17:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:17:34,039 INFO L470 AbstractCegarLoop]: Abstraction has 4377 states and 18456 transitions. [2021-10-04 19:17:34,039 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) [2021-10-04 19:17:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 18456 transitions. [2021-10-04 19:17:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:17:34,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:17:34,048 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] [2021-10-04 19:17:34,088 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 [2021-10-04 19:17:34,249 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 [2021-10-04 19:17:34,250 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)] === [2021-10-04 19:17:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:17:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1193396768, now seen corresponding path program 39 times [2021-10-04 19:17:34,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:17:34,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872187493] [2021-10-04 19:17:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:17:34,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:17:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:17:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:17:36,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:17:36,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872187493] [2021-10-04 19:17:36,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872187493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:36,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862852159] [2021-10-04 19:17:36,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:17:36,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:17:36,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:17:36,071 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) [2021-10-04 19:17:36,079 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 [2021-10-04 19:17:39,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 19:17:39,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:17:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-04 19:17:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:17:41,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:17:41,091 INFO L354 Elim1Store]: treesize reduction 132, result has 22.4 percent of original size [2021-10-04 19:17:41,091 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 [2021-10-04 19:17:41,255 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-04 19:17:41,255 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 [2021-10-04 19:17:41,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:17:41,593 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 [2021-10-04 19:17:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:17:41,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862852159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:41,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:17:41,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-04 19:17:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540756100] [2021-10-04 19:17:41,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-04 19:17:41,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:17:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-04 19:17:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:17:41,655 INFO L87 Difference]: Start difference. First operand 4377 states and 18456 transitions. Second operand has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) [2021-10-04 19:17:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:17:44,518 INFO L93 Difference]: Finished difference Result 6819 states and 28652 transitions. [2021-10-04 19:17:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:17:44,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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 [2021-10-04 19:17:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:17:44,540 INFO L225 Difference]: With dead ends: 6819 [2021-10-04 19:17:44,540 INFO L226 Difference]: Without dead ends: 6796 [2021-10-04 19:17:44,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2562.2ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-10-04 19:17:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2021-10-04 19:17:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 4271. [2021-10-04 19:17:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 4.205854800936768) internal successors, (17959), 4270 states have internal predecessors, (17959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:17:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 17959 transitions. [2021-10-04 19:17:44,652 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 17959 transitions. Word has length 35 [2021-10-04 19:17:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:17:44,652 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 17959 transitions. [2021-10-04 19:17:44,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) [2021-10-04 19:17:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 17959 transitions. [2021-10-04 19:17:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:17:44,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:17:44,662 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] [2021-10-04 19:17:44,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-04 19:17:44,863 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 [2021-10-04 19:17:44,863 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)] === [2021-10-04 19:17:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:17:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1489586688, now seen corresponding path program 40 times [2021-10-04 19:17:44,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:17:44,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924240545] [2021-10-04 19:17:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:17:44,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:17:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:17:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:17:47,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:17:47,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924240545] [2021-10-04 19:17:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924240545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:47,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125239254] [2021-10-04 19:17:47,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:17:47,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:17:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:17:47,336 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) [2021-10-04 19:17:47,337 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 [2021-10-04 19:17:51,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:17:51,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:17:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-04 19:17:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:17:51,266 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 344 treesize of output 312 [2021-10-04 19:17:51,446 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 [2021-10-04 19:17:51,591 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 [2021-10-04 19:17:51,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:17:51,755 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 [2021-10-04 19:17:51,907 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 [2021-10-04 19:17:52,045 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 [2021-10-04 19:17:52,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-04 19:17:52,846 INFO L354 Elim1Store]: treesize reduction 145, result has 21.2 percent of original size [2021-10-04 19:17:52,847 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 6 case distinctions, treesize of input 54 treesize of output 63 [2021-10-04 19:17:53,274 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-10-04 19:17:53,275 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 54 treesize of output 48 [2021-10-04 19:17:53,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-04 19:17:53,498 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 52 treesize of output 77 [2021-10-04 19:17:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:17:53,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125239254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:17:53,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:17:53,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-10-04 19:17:53,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635178040] [2021-10-04 19:17:53,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-04 19:17:53,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:17:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-04 19:17:53,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:17:53,775 INFO L87 Difference]: Start difference. First operand 4271 states and 17959 transitions. Second operand has 33 states, 32 states have (on average 1.90625) internal successors, (61), 32 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) [2021-10-04 19:18:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:18:06,489 INFO L93 Difference]: Finished difference Result 18385 states and 76456 transitions. [2021-10-04 19:18:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-04 19:18:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 32 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 [2021-10-04 19:18:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:18:06,552 INFO L225 Difference]: With dead ends: 18385 [2021-10-04 19:18:06,552 INFO L226 Difference]: Without dead ends: 18247 [2021-10-04 19:18:06,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 10708.5ms TimeCoverageRelationStatistics Valid=933, Invalid=6039, Unknown=0, NotChecked=0, Total=6972 [2021-10-04 19:18:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18247 states. [2021-10-04 19:18:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18247 to 5841. [2021-10-04 19:18:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5841 states, 5840 states have (on average 4.3676369863013695) internal successors, (25507), 5840 states have internal predecessors, (25507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:18:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5841 states to 5841 states and 25507 transitions. [2021-10-04 19:18:06,808 INFO L78 Accepts]: Start accepts. Automaton has 5841 states and 25507 transitions. Word has length 35 [2021-10-04 19:18:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:18:06,809 INFO L470 AbstractCegarLoop]: Abstraction has 5841 states and 25507 transitions. [2021-10-04 19:18:06,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 32 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) [2021-10-04 19:18:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5841 states and 25507 transitions. [2021-10-04 19:18:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:18:06,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:18:06,823 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] [2021-10-04 19:18:06,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-04 19:18:07,023 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 [2021-10-04 19:18:07,024 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)] === [2021-10-04 19:18:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:18:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2047073012, now seen corresponding path program 41 times [2021-10-04 19:18:07,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:18:07,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980669026] [2021-10-04 19:18:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:18:07,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:18:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:18:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:18:08,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:18:08,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980669026] [2021-10-04 19:18:08,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980669026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:18:08,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562736373] [2021-10-04 19:18:08,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:18:08,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:18:08,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:18:08,707 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) [2021-10-04 19:18:08,708 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 [2021-10-04 19:18:12,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 19:18:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:18:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-04 19:18:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:18:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:12,722 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 [2021-10-04 19:18:12,933 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 [2021-10-04 19:18:13,076 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 [2021-10-04 19:18:13,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:18:13,271 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 [2021-10-04 19:18:13,415 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 [2021-10-04 19:18:13,558 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 88 treesize of output 84 [2021-10-04 19:18:13,981 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 57 treesize of output 53 [2021-10-04 19:18:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:18:14,776 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:18:14,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 64 [2021-10-04 19:18:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:18:16,047 INFO L354 Elim1Store]: treesize reduction 140, result has 17.6 percent of original size [2021-10-04 19:18:16,048 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 80 treesize of output 81 [2021-10-04 19:18:17,647 INFO L354 Elim1Store]: treesize reduction 61, result has 38.4 percent of original size [2021-10-04 19:18:17,648 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 70 [2021-10-04 19:18:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:18:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562736373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:18:17,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:18:17,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-10-04 19:18:17,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137344152] [2021-10-04 19:18:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-04 19:18:17,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:18:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-04 19:18:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-10-04 19:18:17,725 INFO L87 Difference]: Start difference. First operand 5841 states and 25507 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) [2021-10-04 19:18:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:18:27,845 INFO L93 Difference]: Finished difference Result 10641 states and 45380 transitions. [2021-10-04 19:18:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:18:27,845 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 [2021-10-04 19:18:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:18:27,882 INFO L225 Difference]: With dead ends: 10641 [2021-10-04 19:18:27,883 INFO L226 Difference]: Without dead ends: 10618 [2021-10-04 19:18:27,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 4499.4ms TimeCoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2021-10-04 19:18:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2021-10-04 19:18:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 6368. [2021-10-04 19:18:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 4.341448091722946) internal successors, (27642), 6367 states have internal predecessors, (27642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:18:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 27642 transitions. [2021-10-04 19:18:28,072 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 27642 transitions. Word has length 35 [2021-10-04 19:18:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:18:28,073 INFO L470 AbstractCegarLoop]: Abstraction has 6368 states and 27642 transitions. [2021-10-04 19:18:28,073 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) [2021-10-04 19:18:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 27642 transitions. [2021-10-04 19:18:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:18:28,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:18:28,087 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] [2021-10-04 19:18:28,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-04 19:18:28,288 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 [2021-10-04 19:18:28,289 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)] === [2021-10-04 19:18:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:18:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash -59417652, now seen corresponding path program 42 times [2021-10-04 19:18:28,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:18:28,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659125756] [2021-10-04 19:18:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:18:28,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:18:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:18:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:18:31,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:18:31,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659125756] [2021-10-04 19:18:31,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659125756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:18:31,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949087647] [2021-10-04 19:18:31,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:18:31,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:18:31,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:18:31,478 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) [2021-10-04 19:18:31,483 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 [2021-10-04 19:18:35,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 19:18:35,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:18:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-04 19:18:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:18:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:35,687 INFO L354 Elim1Store]: treesize reduction 173, result has 17.6 percent of original size [2021-10-04 19:18:35,687 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 [2021-10-04 19:18:35,904 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 [2021-10-04 19:18:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,198 INFO L354 Elim1Store]: treesize reduction 124, result has 13.3 percent of original size [2021-10-04 19:18:36,198 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 [2021-10-04 19:18:36,461 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 [2021-10-04 19:18:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:18:36,916 INFO L354 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2021-10-04 19:18:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 100 [2021-10-04 19:18:37,229 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 15 treesize of output 11 [2021-10-04 19:18:37,315 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 209 treesize of output 205 [2021-10-04 19:18:37,977 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 94 treesize of output 90 [2021-10-04 19:18:38,956 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:18:38,957 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 94 treesize of output 96 [2021-10-04 19:18:41,084 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-10-04 19:18:41,084 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 110 treesize of output 111 [2021-10-04 19:18:42,161 INFO L354 Elim1Store]: treesize reduction 60, result has 42.9 percent of original size [2021-10-04 19:18:42,162 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 89 treesize of output 89 [2021-10-04 19:18:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:18:42,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949087647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:18:42,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:18:42,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-10-04 19:18:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537751578] [2021-10-04 19:18:42,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-04 19:18:42,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:18:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-04 19:18:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:18:42,381 INFO L87 Difference]: Start difference. First operand 6368 states and 27642 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) [2021-10-04 19:18:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:18:57,649 INFO L93 Difference]: Finished difference Result 10016 states and 42928 transitions. [2021-10-04 19:18:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:18:57,649 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 [2021-10-04 19:18:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:18:57,679 INFO L225 Difference]: With dead ends: 10016 [2021-10-04 19:18:57,679 INFO L226 Difference]: Without dead ends: 9993 [2021-10-04 19:18:57,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 7048.7ms TimeCoverageRelationStatistics Valid=238, Invalid=2114, Unknown=0, NotChecked=0, Total=2352 [2021-10-04 19:18:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-10-04 19:18:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 6210. [2021-10-04 19:18:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 4.344983089064262) internal successors, (26978), 6209 states have internal predecessors, (26978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:18:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 26978 transitions. [2021-10-04 19:18:57,852 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 26978 transitions. Word has length 35 [2021-10-04 19:18:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:18:57,853 INFO L470 AbstractCegarLoop]: Abstraction has 6210 states and 26978 transitions. [2021-10-04 19:18:57,853 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) [2021-10-04 19:18:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 26978 transitions. [2021-10-04 19:18:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:18:57,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:18:57,866 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] [2021-10-04 19:18:57,906 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 [2021-10-04 19:18:58,066 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 [2021-10-04 19:18:58,067 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)] === [2021-10-04 19:18:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:18:58,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1552566188, now seen corresponding path program 43 times [2021-10-04 19:18:58,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:18:58,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63650056] [2021-10-04 19:18:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:18:58,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:18:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:19:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:19:00,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:19:00,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63650056] [2021-10-04 19:19:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63650056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:00,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678910282] [2021-10-04 19:19:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:19:00,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:19:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:19:00,567 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) [2021-10-04 19:19:00,568 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 [2021-10-04 19:19:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:19:04,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-04 19:19:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:19:05,220 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 [2021-10-04 19:19:05,391 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 [2021-10-04 19:19:05,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-04 19:19:05,533 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 [2021-10-04 19:19:05,770 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 [2021-10-04 19:19:05,880 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 88 treesize of output 84 [2021-10-04 19:19:06,195 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 57 treesize of output 53 [2021-10-04 19:19:06,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:19:06,826 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:19:06,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 64 [2021-10-04 19:19:09,683 INFO L354 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2021-10-04 19:19:09,684 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 96 treesize of output 91 [2021-10-04 19:19:10,273 INFO L354 Elim1Store]: treesize reduction 18, result has 81.8 percent of original size [2021-10-04 19:19:10,273 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 119 [2021-10-04 19:19:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:19:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678910282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:10,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:19:10,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-10-04 19:19:10,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939827258] [2021-10-04 19:19:10,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-04 19:19:10,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:19:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-04 19:19:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-10-04 19:19:10,693 INFO L87 Difference]: Start difference. First operand 6210 states and 26978 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) [2021-10-04 19:19:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:19:18,701 INFO L93 Difference]: Finished difference Result 10135 states and 43545 transitions. [2021-10-04 19:19:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:19:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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 [2021-10-04 19:19:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:19:18,734 INFO L225 Difference]: With dead ends: 10135 [2021-10-04 19:19:18,734 INFO L226 Difference]: Without dead ends: 10112 [2021-10-04 19:19:18,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 4989.7ms TimeCoverageRelationStatistics Valid=231, Invalid=2025, Unknown=0, NotChecked=0, Total=2256 [2021-10-04 19:19:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2021-10-04 19:19:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 6247. [2021-10-04 19:19:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 4.342619276336856) internal successors, (27124), 6246 states have internal predecessors, (27124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:19:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 27124 transitions. [2021-10-04 19:19:18,906 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 27124 transitions. Word has length 35 [2021-10-04 19:19:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:19:18,906 INFO L470 AbstractCegarLoop]: Abstraction has 6247 states and 27124 transitions. [2021-10-04 19:19:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) [2021-10-04 19:19:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 27124 transitions. [2021-10-04 19:19:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:19:18,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:19:18,920 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] [2021-10-04 19:19:18,962 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 [2021-10-04 19:19:19,126 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 [2021-10-04 19:19:19,127 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)] === [2021-10-04 19:19:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:19:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash -65832884, now seen corresponding path program 44 times [2021-10-04 19:19:19,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:19:19,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926543978] [2021-10-04 19:19:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:19:19,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:19:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:19:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:19:21,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:19:21,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926543978] [2021-10-04 19:19:21,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926543978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:21,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081440613] [2021-10-04 19:19:21,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:19:21,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:19:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:19:21,349 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) [2021-10-04 19:19:21,350 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 [2021-10-04 19:19:25,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:19:25,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:19:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-04 19:19:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:19:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:25,724 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 51 treesize of output 47 [2021-10-04 19:19:26,590 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:19:26,591 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 [2021-10-04 19:19:26,732 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:19:26,732 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 [2021-10-04 19:19:27,241 INFO L354 Elim1Store]: treesize reduction 20, result has 81.0 percent of original size [2021-10-04 19:19:27,242 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 [2021-10-04 19:19:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:19:27,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081440613] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:27,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:19:27,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2021-10-04 19:19:27,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665649817] [2021-10-04 19:19:27,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:19:27,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:19:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:19:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:19:27,484 INFO L87 Difference]: Start difference. First operand 6247 states and 27124 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) [2021-10-04 19:19:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:19:31,050 INFO L93 Difference]: Finished difference Result 10050 states and 43049 transitions. [2021-10-04 19:19:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:19:31,051 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 [2021-10-04 19:19:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:19:31,082 INFO L225 Difference]: With dead ends: 10050 [2021-10-04 19:19:31,083 INFO L226 Difference]: Without dead ends: 10027 [2021-10-04 19:19:31,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3291.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-10-04 19:19:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-10-04 19:19:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 6209. [2021-10-04 19:19:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6209 states, 6208 states have (on average 4.345360824742268) internal successors, (26976), 6208 states have internal predecessors, (26976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:19:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6209 states to 6209 states and 26976 transitions. [2021-10-04 19:19:31,362 INFO L78 Accepts]: Start accepts. Automaton has 6209 states and 26976 transitions. Word has length 35 [2021-10-04 19:19:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:19:31,362 INFO L470 AbstractCegarLoop]: Abstraction has 6209 states and 26976 transitions. [2021-10-04 19:19:31,363 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) [2021-10-04 19:19:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6209 states and 26976 transitions. [2021-10-04 19:19:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:19:31,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:19:31,376 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] [2021-10-04 19:19:31,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-04 19:19:31,577 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 [2021-10-04 19:19:31,578 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)] === [2021-10-04 19:19:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:19:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash -650236810, now seen corresponding path program 45 times [2021-10-04 19:19:31,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:19:31,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897122290] [2021-10-04 19:19:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:19:31,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:19:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:19:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:19:33,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:19:33,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897122290] [2021-10-04 19:19:33,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897122290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:33,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115717834] [2021-10-04 19:19:33,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:19:33,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:19:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:19:33,148 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) [2021-10-04 19:19:33,151 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 [2021-10-04 19:19:37,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:19:37,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:19:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-04 19:19:37,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:19:38,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:19:38,922 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-04 19:19:38,923 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 [2021-10-04 19:19:39,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-04 19:19:39,851 INFO L354 Elim1Store]: treesize reduction 130, result has 17.7 percent of original size [2021-10-04 19:19:39,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 67 [2021-10-04 19:19:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:19:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115717834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:40,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:19:40,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-04 19:19:40,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478713723] [2021-10-04 19:19:40,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-04 19:19:40,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:19:40,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-04 19:19:40,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:19:40,257 INFO L87 Difference]: Start difference. First operand 6209 states and 26976 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) [2021-10-04 19:19:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:19:42,379 INFO L93 Difference]: Finished difference Result 8115 states and 34949 transitions. [2021-10-04 19:19:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 19:19:42,380 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 [2021-10-04 19:19:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:19:42,405 INFO L225 Difference]: With dead ends: 8115 [2021-10-04 19:19:42,405 INFO L226 Difference]: Without dead ends: 8092 [2021-10-04 19:19:42,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2484.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-10-04 19:19:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-10-04 19:19:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 6209. [2021-10-04 19:19:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6209 states, 6208 states have (on average 4.345360824742268) internal successors, (26976), 6208 states have internal predecessors, (26976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:19:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6209 states to 6209 states and 26976 transitions. [2021-10-04 19:19:42,557 INFO L78 Accepts]: Start accepts. Automaton has 6209 states and 26976 transitions. Word has length 35 [2021-10-04 19:19:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:19:42,558 INFO L470 AbstractCegarLoop]: Abstraction has 6209 states and 26976 transitions. [2021-10-04 19:19:42,558 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) [2021-10-04 19:19:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6209 states and 26976 transitions. [2021-10-04 19:19:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:19:42,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:19:42,571 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] [2021-10-04 19:19:42,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-04 19:19:42,772 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 [2021-10-04 19:19:42,772 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)] === [2021-10-04 19:19:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:19:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash 302442622, now seen corresponding path program 46 times [2021-10-04 19:19:42,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:19:42,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000507486] [2021-10-04 19:19:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:19:42,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:19:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:19:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:19:45,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:19:45,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000507486] [2021-10-04 19:19:45,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000507486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:45,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986654459] [2021-10-04 19:19:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:19:45,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:19:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:19:45,024 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) [2021-10-04 19:19:45,025 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 [2021-10-04 19:19:49,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:19:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:19:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-04 19:19:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:19:49,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:49,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:49,809 INFO L354 Elim1Store]: treesize reduction 209, result has 16.7 percent of original size [2021-10-04 19:19:49,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 76 [2021-10-04 19:19:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-04 19:19:50,340 INFO L354 Elim1Store]: treesize reduction 84, result has 42.1 percent of original size [2021-10-04 19:19:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 56 treesize of output 102 [2021-10-04 19:19:51,666 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-04 19:19:51,667 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 41 treesize of output 43 [2021-10-04 19:19:52,316 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 [2021-10-04 19:19:52,466 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 [2021-10-04 19:19:53,014 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-04 19:19:53,015 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 30 treesize of output 16 [2021-10-04 19:19:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:19:53,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986654459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:19:53,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:19:53,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 31 [2021-10-04 19:19:53,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940681457] [2021-10-04 19:19:53,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-04 19:19:53,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:19:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-04 19:19:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:19:53,027 INFO L87 Difference]: Start difference. First operand 6209 states and 26976 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 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) [2021-10-04 19:20:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:20:05,029 INFO L93 Difference]: Finished difference Result 12163 states and 50920 transitions. [2021-10-04 19:20:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-04 19:20:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 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 [2021-10-04 19:20:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:20:05,030 INFO L225 Difference]: With dead ends: 12163 [2021-10-04 19:20:05,030 INFO L226 Difference]: Without dead ends: 0 [2021-10-04 19:20:05,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 7922.6ms TimeCoverageRelationStatistics Valid=457, Invalid=4373, Unknown=0, NotChecked=0, Total=4830 [2021-10-04 19:20:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-04 19:20:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-04 19:20:05,031 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) [2021-10-04 19:20:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-04 19:20:05,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-10-04 19:20:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:20:05,032 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-04 19:20:05,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 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) [2021-10-04 19:20:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-04 19:20:05,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-04 19:20:05,035 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 19:20:05,036 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 19:20:05,036 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 19:20:05,036 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-04 19:20:05,036 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-04 19:20:05,087 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 [2021-10-04 19:20:05,249 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 [2021-10-04 19:20:05,256 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 19:20:05,256 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 19:20:05,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 07:20:05 BasicIcfg [2021-10-04 19:20:05,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 19:20:05,259 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 19:20:05,259 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 19:20:05,259 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 19:20:05,260 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:09:20" (3/4) ... [2021-10-04 19:20:05,265 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-04 19:20:05,272 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-04 19:20:05,272 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-04 19:20:05,273 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-04 19:20:05,273 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread4 [2021-10-04 19:20:05,282 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-04 19:20:05,283 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-04 19:20:05,283 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 19:20:05,283 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-04 19:20:05,337 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 19:20:05,337 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 19:20:05,338 INFO L168 Benchmark]: Toolchain (without parser) took 646124.33 ms. Allocated memory was 48.2 MB in the beginning and 2.6 GB in the end (delta: 2.5 GB). Free memory was 24.9 MB in the beginning and 670.0 MB in the end (delta: -645.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,339 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 35.7 MB. Free memory was 17.2 MB in the beginning and 17.2 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 19:20:05,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.61 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 24.5 MB in the end (delta: 107.8 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,339 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.01 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 22.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,340 INFO L168 Benchmark]: Boogie Preprocessor took 61.43 ms. Allocated memory is still 48.2 MB. Free memory was 22.2 MB in the beginning and 31.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,340 INFO L168 Benchmark]: RCFGBuilder took 1036.20 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 31.8 MB in the beginning and 39.8 MB in the end (delta: -8.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,340 INFO L168 Benchmark]: TraceAbstraction took 644485.31 ms. Allocated memory was 58.7 MB in the beginning and 2.6 GB in the end (delta: 2.5 GB). Free memory was 39.3 MB in the beginning and 674.2 MB in the end (delta: -635.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,341 INFO L168 Benchmark]: Witness Printer took 78.49 ms. Allocated memory is still 2.6 GB. Free memory was 674.2 MB in the beginning and 670.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:20:05,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 35.7 MB. Free memory was 17.2 MB in the beginning and 17.2 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 395.61 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 24.5 MB in the end (delta: 107.8 kB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.01 ms. Allocated memory is still 48.2 MB. Free memory was 24.4 MB in the beginning and 22.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.43 ms. Allocated memory is still 48.2 MB. Free memory was 22.2 MB in the beginning and 31.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1036.20 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 31.8 MB in the beginning and 39.8 MB in the end (delta: -8.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 644485.31 ms. Allocated memory was 58.7 MB in the beginning and 2.6 GB in the end (delta: 2.5 GB). Free memory was 39.3 MB in the beginning and 674.2 MB in the end (delta: -635.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. * Witness Printer took 78.49 ms. Allocated memory is still 2.6 GB. Free memory was 674.2 MB in the beginning and 670.0 MB 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: 7814.4ms, 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: 113, positive: 26, positive conditional: 0, positive unconditional: 26, negative: 88, negative conditional: 0, negative unconditional: 88, 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: 644333.6ms, OverallIterations: 58, TraceHistogramMax: 1, EmptinessCheckTime: 493.1ms, AutomataDifference: 258162.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7911.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2317 SDtfs, 17738 SDslu, 22331 SDs, 0 SdLazy, 66069 SolverSat, 4372 SolverUnsat, 20 SolverUnknown, 0 SolverNotchecked, 112787.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3237 GetRequests, 1078 SyntacticMatches, 46 SemanticMatches, 2113 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20026 ImplicationChecksByTransitivity, 208473.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6368occurred in iteration=53, InterpolantAutomatonStates: 1269, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5874.7ms AutomataMinimizationTime, 58 MinimizatonAttempts, 103979 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 834.7ms SsaConstructionTime, 6072.4ms SatisfiabilityAnalysisTime, 244311.9ms InterpolantComputationTime, 3655 NumberOfCodeBlocks, 3655 NumberOfCodeBlocksAsserted, 162 NumberOfCheckSat, 3548 ConstructedInterpolants, 316 QuantifiedInterpolants, 175762 SizeOfPredicates, 1466 NumberOfNonLiveVariables, 14198 ConjunctsInSsa, 3230 ConjunctsInUnsatCore, 107 InterpolantComputations, 10 PerfectInterpolantSequences, 117/691 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! [2021-10-04 19:20:05,530 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 0 Received shutdown request...