/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 19:23:31,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 19:23:31,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 19:23:31,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 19:23:31,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 19:23:31,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 19:23:31,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 19:23:31,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 19:23:31,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 19:23:31,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 19:23:31,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 19:23:31,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 19:23:31,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 19:23:31,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 19:23:31,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 19:23:31,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 19:23:31,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 19:23:31,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 19:23:31,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 19:23:31,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 19:23:31,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 19:23:31,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 19:23:31,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 19:23:31,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 19:23:31,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 19:23:31,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 19:23:31,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 19:23:31,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 19:23:31,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 19:23:31,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 19:23:31,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 19:23:31,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 19:23:31,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 19:23:31,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 19:23:31,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 19:23:31,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 19:23:31,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 19:23:31,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 19:23:31,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 19:23:31,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 19:23:31,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 19:23:31,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 19:23:31,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 19:23:31,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 19:23:31,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 19:23:31,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 19:23:31,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 19:23:31,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 19:23:31,261 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 19:23:31,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 19:23:31,262 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 19:23:31,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 19:23:31,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 19:23:31,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 19:23:31,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 19:23:31,264 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 19:23:31,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 19:23:31,265 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 19:23:31,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 19:23:31,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 19:23:31,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 19:23:31,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-15 19:23:31,475 INFO L275 PluginConnector]: CDTParser initialized [2022-03-15 19:23:31,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2022-03-15 19:23:31,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8031edf4a/1fdb20c06c2348c1bb1de5ebf82beba9/FLAGdfa27004a [2022-03-15 19:23:31,859 INFO L306 CDTParser]: Found 1 translation units. [2022-03-15 19:23:31,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2022-03-15 19:23:31,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8031edf4a/1fdb20c06c2348c1bb1de5ebf82beba9/FLAGdfa27004a [2022-03-15 19:23:32,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8031edf4a/1fdb20c06c2348c1bb1de5ebf82beba9 [2022-03-15 19:23:32,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 19:23:32,304 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-15 19:23:32,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-15 19:23:32,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-15 19:23:32,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-15 19:23:32,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53bb78d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32, skipping insertion in model container [2022-03-15 19:23:32,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-15 19:23:32,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-15 19:23:32,481 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-03-15 19:23:32,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 19:23:32,498 INFO L203 MainTranslator]: Completed pre-run [2022-03-15 19:23:32,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-03-15 19:23:32,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 19:23:32,522 INFO L208 MainTranslator]: Completed translation [2022-03-15 19:23:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32 WrapperNode [2022-03-15 19:23:32,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-15 19:23:32,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 19:23:32,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 19:23:32,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 19:23:32,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,575 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2022-03-15 19:23:32,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 19:23:32,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 19:23:32,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 19:23:32,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 19:23:32,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 19:23:32,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 19:23:32,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 19:23:32,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 19:23:32,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (1/1) ... [2022-03-15 19:23:32,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 19:23:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:32,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 19:23:32,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 19:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-15 19:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 19:23:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 19:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 19:23:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 19:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-15 19:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-15 19:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-15 19:23:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-03-15 19:23:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-03-15 19:23:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-15 19:23:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 19:23:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 19:23:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-15 19:23:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-15 19:23:32,679 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 19:23:32,746 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 19:23:32,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 19:23:33,027 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 19:23:33,069 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 19:23:33,070 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-15 19:23:33,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 07:23:33 BoogieIcfgContainer [2022-03-15 19:23:33,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 19:23:33,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 19:23:33,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 19:23:33,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 19:23:33,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.03 07:23:32" (1/3) ... [2022-03-15 19:23:33,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fab3e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 07:23:33, skipping insertion in model container [2022-03-15 19:23:33,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:23:32" (2/3) ... [2022-03-15 19:23:33,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fab3e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 07:23:33, skipping insertion in model container [2022-03-15 19:23:33,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 07:23:33" (3/3) ... [2022-03-15 19:23:33,082 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-03-15 19:23:33,085 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 19:23:33,086 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 19:23:33,086 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 19:23:33,086 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 19:23:33,134 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,134 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,134 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,134 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,134 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,135 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,135 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,135 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,136 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,136 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,137 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,144 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,144 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,145 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,145 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,145 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,145 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,148 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,148 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,148 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,148 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,150 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,151 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:23:33,165 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 19:23:33,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 19:23:33,209 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 19:23:33,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 19:23:33,223 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 19:23:33,229 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 189 transitions, 394 flow [2022-03-15 19:23:33,231 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 189 transitions, 394 flow [2022-03-15 19:23:33,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2022-03-15 19:23:33,281 INFO L129 PetriNetUnfolder]: 15/187 cut-off events. [2022-03-15 19:23:33,281 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 19:23:33,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-03-15 19:23:33,286 INFO L116 LiptonReduction]: Number of co-enabled transitions 690 [2022-03-15 19:23:37,535 INFO L131 LiptonReduction]: Checked pairs total: 1291 [2022-03-15 19:23:37,535 INFO L133 LiptonReduction]: Total number of compositions: 194 [2022-03-15 19:23:37,545 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 26 transitions, 68 flow [2022-03-15 19:23:37,559 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 64 states, 63 states have (on average 2.4444444444444446) internal successors, (154), 63 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 63 states have (on average 2.4444444444444446) internal successors, (154), 63 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 19:23:37,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:37,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:37,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1743342258, now seen corresponding path program 1 times [2022-03-15 19:23:37,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:37,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653821590] [2022-03-15 19:23:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:37,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:37,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:37,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653821590] [2022-03-15 19:23:37,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653821590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:23:37,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:23:37,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 19:23:37,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1407423535] [2022-03-15 19:23:37,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:37,781 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:37,799 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 42 transitions. [2022-03-15 19:23:37,799 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:37,946 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [316#(< ~i~0 ~N~0)] [2022-03-15 19:23:37,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 19:23:37,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 19:23:37,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 19:23:37,967 INFO L87 Difference]: Start difference. First operand has 64 states, 63 states have (on average 2.4444444444444446) internal successors, (154), 63 states have internal predecessors, (154), 0 states have call successors, (0), 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 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:38,029 INFO L93 Difference]: Finished difference Result 104 states and 260 transitions. [2022-03-15 19:23:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 19:23:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 19:23:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:38,055 INFO L225 Difference]: With dead ends: 104 [2022-03-15 19:23:38,055 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 19:23:38,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 19:23:38,058 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:38,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:23:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 19:23:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2022-03-15 19:23:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 178 transitions. [2022-03-15 19:23:38,083 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 178 transitions. Word has length 14 [2022-03-15 19:23:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:38,084 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 178 transitions. [2022-03-15 19:23:38,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 178 transitions. [2022-03-15 19:23:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 19:23:38,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:38,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:38,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 19:23:38,085 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:38,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1957435357, now seen corresponding path program 1 times [2022-03-15 19:23:38,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:38,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677051879] [2022-03-15 19:23:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:38,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:38,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677051879] [2022-03-15 19:23:38,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677051879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:23:38,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:23:38,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:23:38,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [539498572] [2022-03-15 19:23:38,146 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:38,149 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:38,153 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2022-03-15 19:23:38,153 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:38,244 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [574#(< ~i~0 ~N~0)] [2022-03-15 19:23:38,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:23:38,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:23:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 19:23:38,246 INFO L87 Difference]: Start difference. First operand 74 states and 178 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:38,318 INFO L93 Difference]: Finished difference Result 105 states and 261 transitions. [2022-03-15 19:23:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 19:23:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 19:23:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:38,319 INFO L225 Difference]: With dead ends: 105 [2022-03-15 19:23:38,319 INFO L226 Difference]: Without dead ends: 105 [2022-03-15 19:23:38,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-15 19:23:38,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:38,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:23:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-15 19:23:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2022-03-15 19:23:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.418918918918919) internal successors, (179), 74 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 179 transitions. [2022-03-15 19:23:38,325 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 179 transitions. Word has length 16 [2022-03-15 19:23:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 179 transitions. [2022-03-15 19:23:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 179 transitions. [2022-03-15 19:23:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 19:23:38,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:38,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:38,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 19:23:38,327 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash 360369356, now seen corresponding path program 1 times [2022-03-15 19:23:38,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:38,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022270104] [2022-03-15 19:23:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:38,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:38,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022270104] [2022-03-15 19:23:38,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022270104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:23:38,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:23:38,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 19:23:38,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2121390961] [2022-03-15 19:23:38,379 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:38,381 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:38,386 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 51 transitions. [2022-03-15 19:23:38,386 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:38,546 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:23:38,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 19:23:38,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 19:23:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 19:23:38,548 INFO L87 Difference]: Start difference. First operand 75 states and 179 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:38,607 INFO L93 Difference]: Finished difference Result 118 states and 288 transitions. [2022-03-15 19:23:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 19:23:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 19:23:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:38,609 INFO L225 Difference]: With dead ends: 118 [2022-03-15 19:23:38,610 INFO L226 Difference]: Without dead ends: 103 [2022-03-15 19:23:38,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 16 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 19:23:38,615 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:38,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:23:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-15 19:23:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2022-03-15 19:23:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.4431818181818183) internal successors, (215), 88 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 215 transitions. [2022-03-15 19:23:38,625 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 215 transitions. Word has length 17 [2022-03-15 19:23:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:38,626 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 215 transitions. [2022-03-15 19:23:38,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 215 transitions. [2022-03-15 19:23:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 19:23:38,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:38,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:38,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 19:23:38,628 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:38,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1640024644, now seen corresponding path program 1 times [2022-03-15 19:23:38,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:38,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844462494] [2022-03-15 19:23:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:38,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:38,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844462494] [2022-03-15 19:23:38,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844462494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:23:38,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:23:38,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:23:38,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1749448315] [2022-03-15 19:23:38,757 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:38,760 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:38,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 75 transitions. [2022-03-15 19:23:38,769 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:39,196 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1137#(and (or (= |thread2Thread1of1ForFork1_~cond~0#1| 0) (< ~i~0 ~N~0)) (or (<= ~end~0 ~start~0) (< ~i~0 ~N~0))), 1136#(< ~i~0 ~N~0)] [2022-03-15 19:23:39,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 19:23:39,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 19:23:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 19:23:39,197 INFO L87 Difference]: Start difference. First operand 89 states and 215 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:39,311 INFO L93 Difference]: Finished difference Result 111 states and 254 transitions. [2022-03-15 19:23:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 19:23:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 19:23:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:39,313 INFO L225 Difference]: With dead ends: 111 [2022-03-15 19:23:39,313 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 19:23:39,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-15 19:23:39,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:39,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:23:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 19:23:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2022-03-15 19:23:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 216 transitions. [2022-03-15 19:23:39,335 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 216 transitions. Word has length 19 [2022-03-15 19:23:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:39,335 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 216 transitions. [2022-03-15 19:23:39,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 216 transitions. [2022-03-15 19:23:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 19:23:39,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:39,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:39,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 19:23:39,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1351689810, now seen corresponding path program 1 times [2022-03-15 19:23:39,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:39,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472575037] [2022-03-15 19:23:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:39,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:39,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:39,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472575037] [2022-03-15 19:23:39,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472575037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:23:39,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:23:39,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 19:23:39,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879860234] [2022-03-15 19:23:39,438 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:39,443 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:39,456 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 77 transitions. [2022-03-15 19:23:39,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:39,659 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:23:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:23:39,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:23:39,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:23:39,662 INFO L87 Difference]: Start difference. First operand 89 states and 216 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:39,701 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2022-03-15 19:23:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 19:23:39,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 19:23:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:39,702 INFO L225 Difference]: With dead ends: 105 [2022-03-15 19:23:39,703 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 19:23:39,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:23:39,705 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:39,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 3 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:23:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 19:23:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-15 19:23:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.438202247191011) internal successors, (217), 89 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 217 transitions. [2022-03-15 19:23:39,717 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 217 transitions. Word has length 21 [2022-03-15 19:23:39,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:39,718 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 217 transitions. [2022-03-15 19:23:39,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 217 transitions. [2022-03-15 19:23:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 19:23:39,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:39,719 INFO L514 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] [2022-03-15 19:23:39,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 19:23:39,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash -39719742, now seen corresponding path program 1 times [2022-03-15 19:23:39,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:39,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403165735] [2022-03-15 19:23:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:39,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:23:40,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:40,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403165735] [2022-03-15 19:23:40,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403165735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:23:40,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113329219] [2022-03-15 19:23:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:40,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:40,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:23:40,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 19:23:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:40,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 19:23:40,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:23:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:23:40,692 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:23:40,692 INFO L387 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 37 treesize of output 44 [2022-03-15 19:23:40,705 INFO L387 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 27 treesize of output 15 [2022-03-15 19:23:40,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-15 19:23:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:40,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:23:41,209 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-03-15 19:23:41,210 INFO L387 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 69 treesize of output 68 [2022-03-15 19:23:41,220 INFO L387 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 29 treesize of output 23 [2022-03-15 19:23:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:41,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113329219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:23:41,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:23:41,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2022-03-15 19:23:41,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1173200845] [2022-03-15 19:23:41,521 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:41,525 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:41,536 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 78 transitions. [2022-03-15 19:23:41,536 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:42,118 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:23:42,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:23:42,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:23:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=805, Unknown=2, NotChecked=0, Total=992 [2022-03-15 19:23:42,119 INFO L87 Difference]: Start difference. First operand 90 states and 217 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:42,466 INFO L93 Difference]: Finished difference Result 191 states and 467 transitions. [2022-03-15 19:23:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:23:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 19:23:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:42,467 INFO L225 Difference]: With dead ends: 191 [2022-03-15 19:23:42,467 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 19:23:42,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1090, Unknown=2, NotChecked=0, Total=1332 [2022-03-15 19:23:42,468 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:42,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:23:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 19:23:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2022-03-15 19:23:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.4326241134751774) internal successors, (343), 141 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2022-03-15 19:23:42,471 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 22 [2022-03-15 19:23:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:42,471 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2022-03-15 19:23:42,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2022-03-15 19:23:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 19:23:42,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:42,472 INFO L514 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] [2022-03-15 19:23:42,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 19:23:42,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-15 19:23:42,673 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1124706540, now seen corresponding path program 2 times [2022-03-15 19:23:42,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:42,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742447928] [2022-03-15 19:23:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:42,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:23:43,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:43,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742447928] [2022-03-15 19:23:43,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742447928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:23:43,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134415613] [2022-03-15 19:23:43,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:23:43,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:43,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:23:43,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 19:23:43,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:23:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:23:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 19:23:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:23:43,295 INFO L387 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 [2022-03-15 19:23:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:23:43,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-15 19:23:43,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:23:43,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-15 19:23:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 19:23:43,648 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 19:23:43,648 INFO L387 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 10 [2022-03-15 19:23:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:43,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:23:44,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:44,070 INFO L387 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 79 [2022-03-15 19:23:44,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:44,081 INFO L387 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 547 treesize of output 535 [2022-03-15 19:23:44,123 INFO L353 Elim1Store]: treesize reduction 44, result has 54.6 percent of original size [2022-03-15 19:23:44,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 755 treesize of output 768 [2022-03-15 19:23:44,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:44,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 756 treesize of output 672 [2022-03-15 19:23:44,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:44,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 624 treesize of output 606 [2022-03-15 19:23:49,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:49,108 INFO L387 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 295 treesize of output 282 [2022-03-15 19:23:49,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:49,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 79 treesize of output 99 [2022-03-15 19:23:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:49,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134415613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:23:49,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:23:49,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-03-15 19:23:49,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592135744] [2022-03-15 19:23:49,763 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:49,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:49,791 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 82 transitions. [2022-03-15 19:23:49,791 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:50,577 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2521#(and (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= 0 (+ (- 1) ~ok~0)) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (= (+ ~queue~0.offset (* ~start~0 4)) 0) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= ~queue~0.offset 0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)))] [2022-03-15 19:23:50,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:23:50,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:23:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=774, Unknown=5, NotChecked=0, Total=930 [2022-03-15 19:23:50,579 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2022-03-15 19:23:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:50,862 INFO L93 Difference]: Finished difference Result 249 states and 613 transitions. [2022-03-15 19:23:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 19:23:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 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 22 [2022-03-15 19:23:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:50,863 INFO L225 Difference]: With dead ends: 249 [2022-03-15 19:23:50,864 INFO L226 Difference]: Without dead ends: 236 [2022-03-15 19:23:50,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1059, Unknown=5, NotChecked=0, Total=1260 [2022-03-15 19:23:50,864 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:50,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:23:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-15 19:23:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 154. [2022-03-15 19:23:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.4379084967320264) internal successors, (373), 153 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2022-03-15 19:23:50,868 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 22 [2022-03-15 19:23:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:50,869 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2022-03-15 19:23:50,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2022-03-15 19:23:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2022-03-15 19:23:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 19:23:50,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:50,869 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:50,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 19:23:51,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-03-15 19:23:51,070 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:51,071 INFO L85 PathProgramCache]: Analyzing trace with hash -223742894, now seen corresponding path program 3 times [2022-03-15 19:23:51,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:51,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542327491] [2022-03-15 19:23:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:23:51,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:51,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542327491] [2022-03-15 19:23:51,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542327491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:23:51,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165403971] [2022-03-15 19:23:51,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:23:51,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:51,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:23:51,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 19:23:51,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:23:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:23:51,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 19:23:51,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:23:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:23:51,883 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:23:51,883 INFO L387 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 37 treesize of output 44 [2022-03-15 19:23:51,891 INFO L387 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 27 treesize of output 15 [2022-03-15 19:23:51,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 19:23:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:52,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:23:52,139 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_205 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_205) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0))) is different from false [2022-03-15 19:23:52,216 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-03-15 19:23:52,217 INFO L387 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 69 treesize of output 68 [2022-03-15 19:23:52,220 INFO L387 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 29 treesize of output 23 [2022-03-15 19:23:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-03-15 19:23:52,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165403971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:23:52,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:23:52,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-03-15 19:23:52,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [413704164] [2022-03-15 19:23:52,364 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:52,366 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:52,377 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 79 transitions. [2022-03-15 19:23:52,377 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:53,171 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:23:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:23:53,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:23:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=626, Unknown=1, NotChecked=52, Total=812 [2022-03-15 19:23:53,172 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2022-03-15 19:23:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:53,517 INFO L93 Difference]: Finished difference Result 328 states and 814 transitions. [2022-03-15 19:23:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:23:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 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 23 [2022-03-15 19:23:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:53,519 INFO L225 Difference]: With dead ends: 328 [2022-03-15 19:23:53,519 INFO L226 Difference]: Without dead ends: 315 [2022-03-15 19:23:53,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=830, Unknown=1, NotChecked=60, Total=1056 [2022-03-15 19:23:53,520 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:53,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:23:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-15 19:23:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 163. [2022-03-15 19:23:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.432098765432099) internal successors, (394), 162 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 394 transitions. [2022-03-15 19:23:53,524 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 394 transitions. Word has length 23 [2022-03-15 19:23:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:53,524 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 394 transitions. [2022-03-15 19:23:53,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2022-03-15 19:23:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 394 transitions. [2022-03-15 19:23:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 19:23:53,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:53,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:53,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 19:23:53,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:53,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash 940683388, now seen corresponding path program 4 times [2022-03-15 19:23:53,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:53,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108510851] [2022-03-15 19:23:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:54,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:54,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108510851] [2022-03-15 19:23:54,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108510851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:23:54,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133120575] [2022-03-15 19:23:54,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:23:54,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:54,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:23:54,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 19:23:54,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:23:54,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:23:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 19:23:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:23:54,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:23:54,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-03-15 19:23:54,835 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-15 19:23:54,835 INFO L387 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 42 treesize of output 10 [2022-03-15 19:23:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:54,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:23:55,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:55,195 INFO L387 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 151 treesize of output 157 [2022-03-15 19:23:55,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:23:55,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 100 treesize of output 118 [2022-03-15 19:23:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:23:55,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133120575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:23:55,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:23:55,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 29 [2022-03-15 19:23:55,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1962534058] [2022-03-15 19:23:55,783 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:55,786 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:55,795 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 83 transitions. [2022-03-15 19:23:55,795 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:56,751 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4075#(and (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= 0 (+ (- 1) ~ok~0)) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (<= (+ ~queue~0.offset (* ~start~0 4) 1) 0)) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= ~queue~0.offset 0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= ~start~0 1) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)))] [2022-03-15 19:23:56,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 19:23:56,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 19:23:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=831, Unknown=1, NotChecked=0, Total=992 [2022-03-15 19:23:56,752 INFO L87 Difference]: Start difference. First operand 163 states and 394 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:57,159 INFO L93 Difference]: Finished difference Result 306 states and 758 transitions. [2022-03-15 19:23:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:23:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 19:23:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:57,161 INFO L225 Difference]: With dead ends: 306 [2022-03-15 19:23:57,162 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 19:23:57,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=1177, Unknown=1, NotChecked=0, Total=1406 [2022-03-15 19:23:57,163 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:57,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:23:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 19:23:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 153. [2022-03-15 19:23:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4342105263157894) internal successors, (370), 152 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 370 transitions. [2022-03-15 19:23:57,174 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 370 transitions. Word has length 23 [2022-03-15 19:23:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:57,174 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 370 transitions. [2022-03-15 19:23:57,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 370 transitions. [2022-03-15 19:23:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 19:23:57,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:57,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:57,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 19:23:57,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:57,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 421408818, now seen corresponding path program 5 times [2022-03-15 19:23:57,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:57,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85175682] [2022-03-15 19:23:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:57,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:57,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85175682] [2022-03-15 19:23:57,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85175682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:23:57,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19447275] [2022-03-15 19:23:57,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:23:57,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:57,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:23:57,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 19:23:57,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 19:23:57,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:23:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:23:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:23:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:57,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:23:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:23:57,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19447275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:23:57,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:23:57,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 10 [2022-03-15 19:23:57,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1831853534] [2022-03-15 19:23:57,663 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:57,666 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:57,676 INFO L252 McrAutomatonBuilder]: Finished intersection with 61 states and 102 transitions. [2022-03-15 19:23:57,676 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:23:58,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [4851#(or (<= ~end~0 ~start~0) (< ~i~0 ~N~0)), 4853#(or (< (+ ~i~0 1) ~N~0) (<= ~end~0 (+ ~start~0 1))), 4850#(and (or (= |thread2Thread1of1ForFork1_~cond~0#1| 0) (< ~i~0 ~N~0)) (or (<= ~end~0 ~start~0) (< ~i~0 ~N~0))), 4849#(< ~i~0 ~N~0), 4852#(or (< ~i~0 ~N~0) (<= ~end~0 (+ ~start~0 1)))] [2022-03-15 19:23:58,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:23:58,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:23:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:23:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-03-15 19:23:58,200 INFO L87 Difference]: Start difference. First operand 153 states and 370 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:23:58,367 INFO L93 Difference]: Finished difference Result 357 states and 835 transitions. [2022-03-15 19:23:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:23:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 19:23:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:23:58,369 INFO L225 Difference]: With dead ends: 357 [2022-03-15 19:23:58,369 INFO L226 Difference]: Without dead ends: 335 [2022-03-15 19:23:58,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:23:58,369 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:23:58,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:23:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-15 19:23:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 283. [2022-03-15 19:23:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.521276595744681) internal successors, (711), 282 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 711 transitions. [2022-03-15 19:23:58,375 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 711 transitions. Word has length 24 [2022-03-15 19:23:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:23:58,375 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 711 transitions. [2022-03-15 19:23:58,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:23:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 711 transitions. [2022-03-15 19:23:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 19:23:58,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:23:58,376 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:23:58,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 19:23:58,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 19:23:58,591 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:23:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:23:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1633493310, now seen corresponding path program 6 times [2022-03-15 19:23:58,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:23:58,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431102982] [2022-03-15 19:23:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:23:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:23:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:23:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:23:59,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:23:59,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431102982] [2022-03-15 19:23:59,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431102982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:23:59,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611424495] [2022-03-15 19:23:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:23:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:23:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:23:59,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:23:59,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 19:23:59,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 19:23:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:23:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 19:23:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:23:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:23:59,389 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:23:59,389 INFO L387 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 37 treesize of output 44 [2022-03-15 19:23:59,399 INFO L387 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 27 treesize of output 15 [2022-03-15 19:23:59,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 19:23:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:23:59,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:23:59,588 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_333 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_333) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0)) (not (= (* 256 (div c_~ok~0 256)) c_~ok~0))) is different from false [2022-03-15 19:23:59,664 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-03-15 19:23:59,664 INFO L387 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 71 treesize of output 70 [2022-03-15 19:23:59,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-15 19:23:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2022-03-15 19:23:59,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611424495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:23:59,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:23:59,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 29 [2022-03-15 19:23:59,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1951843790] [2022-03-15 19:23:59,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:23:59,843 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:23:59,852 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 80 transitions. [2022-03-15 19:23:59,852 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:00,484 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:24:00,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 19:24:00,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 19:24:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=704, Unknown=1, NotChecked=56, Total=930 [2022-03-15 19:24:00,485 INFO L87 Difference]: Start difference. First operand 283 states and 711 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:01,002 INFO L93 Difference]: Finished difference Result 650 states and 1644 transitions. [2022-03-15 19:24:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 19:24:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 19:24:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:01,005 INFO L225 Difference]: With dead ends: 650 [2022-03-15 19:24:01,005 INFO L226 Difference]: Without dead ends: 619 [2022-03-15 19:24:01,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1138, Unknown=1, NotChecked=72, Total=1482 [2022-03-15 19:24:01,005 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:01,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:24:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-15 19:24:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 289. [2022-03-15 19:24:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.5069444444444446) internal successors, (722), 288 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 722 transitions. [2022-03-15 19:24:01,013 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 722 transitions. Word has length 24 [2022-03-15 19:24:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:01,013 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 722 transitions. [2022-03-15 19:24:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 722 transitions. [2022-03-15 19:24:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 19:24:01,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:01,014 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:01,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 19:24:01,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:01,223 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash -469067028, now seen corresponding path program 7 times [2022-03-15 19:24:01,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:01,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894554988] [2022-03-15 19:24:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:01,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:24:01,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:01,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894554988] [2022-03-15 19:24:01,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894554988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:01,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370356475] [2022-03-15 19:24:01,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:24:01,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:01,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:01,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 19:24:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 19:24:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:02,011 INFO L387 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 [2022-03-15 19:24:02,056 INFO L387 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 6 treesize of output 5 [2022-03-15 19:24:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:02,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-03-15 19:24:02,325 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-15 19:24:02,325 INFO L387 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 34 treesize of output 10 [2022-03-15 19:24:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:24:02,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:02,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:02,741 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2022-03-15 19:24:02,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:02,759 INFO L387 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 632 treesize of output 574 [2022-03-15 19:24:02,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:02,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 520 treesize of output 448 [2022-03-15 19:24:02,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:02,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 400 treesize of output 364 [2022-03-15 19:24:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:24:05,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370356475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:05,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:05,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 32 [2022-03-15 19:24:05,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150069196] [2022-03-15 19:24:05,822 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:05,825 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:05,834 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 84 transitions. [2022-03-15 19:24:05,834 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:06,509 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7372#(and (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= ~n~0 ~end~0) (= ~ok~0 1)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= ~queue~0.offset 0) (<= ~n~0 ~end~0)))] [2022-03-15 19:24:06,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 19:24:06,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 19:24:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=985, Unknown=7, NotChecked=0, Total=1190 [2022-03-15 19:24:06,510 INFO L87 Difference]: Start difference. First operand 289 states and 722 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:07,012 INFO L93 Difference]: Finished difference Result 640 states and 1622 transitions. [2022-03-15 19:24:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 19:24:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2022-03-15 19:24:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:07,015 INFO L225 Difference]: With dead ends: 640 [2022-03-15 19:24:07,015 INFO L226 Difference]: Without dead ends: 610 [2022-03-15 19:24:07,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=1407, Unknown=7, NotChecked=0, Total=1722 [2022-03-15 19:24:07,016 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:07,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:24:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-15 19:24:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 299. [2022-03-15 19:24:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.5067114093959733) internal successors, (747), 298 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 747 transitions. [2022-03-15 19:24:07,023 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 747 transitions. Word has length 24 [2022-03-15 19:24:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:07,023 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 747 transitions. [2022-03-15 19:24:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 747 transitions. [2022-03-15 19:24:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 19:24:07,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:07,024 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:07,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 19:24:07,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:07,225 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1908884050, now seen corresponding path program 8 times [2022-03-15 19:24:07,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:07,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725131188] [2022-03-15 19:24:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:07,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:24:08,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725131188] [2022-03-15 19:24:08,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725131188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202612405] [2022-03-15 19:24:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:24:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:08,030 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:08,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 19:24:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:24:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:24:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 19:24:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:08,387 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:24:08,388 INFO L387 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 37 treesize of output 44 [2022-03-15 19:24:08,397 INFO L387 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 27 treesize of output 15 [2022-03-15 19:24:08,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 19:24:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:24:08,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:08,644 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_434 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_434) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0)) (not (= (mod c_~ok~0 256) 0))) is different from false [2022-03-15 19:24:08,725 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-03-15 19:24:08,725 INFO L387 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 69 treesize of output 68 [2022-03-15 19:24:08,728 INFO L387 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 29 treesize of output 23 [2022-03-15 19:24:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2022-03-15 19:24:08,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202612405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:08,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:08,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 35 [2022-03-15 19:24:08,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [544716184] [2022-03-15 19:24:08,895 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:08,898 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:08,908 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 81 transitions. [2022-03-15 19:24:08,908 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:09,450 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:24:09,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 19:24:09,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 19:24:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1051, Unknown=1, NotChecked=68, Total=1332 [2022-03-15 19:24:09,454 INFO L87 Difference]: Start difference. First operand 299 states and 747 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:10,171 INFO L93 Difference]: Finished difference Result 666 states and 1680 transitions. [2022-03-15 19:24:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 19:24:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 19:24:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:10,173 INFO L225 Difference]: With dead ends: 666 [2022-03-15 19:24:10,173 INFO L226 Difference]: Without dead ends: 635 [2022-03-15 19:24:10,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=1651, Unknown=1, NotChecked=86, Total=2070 [2022-03-15 19:24:10,174 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:10,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:24:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-03-15 19:24:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 305. [2022-03-15 19:24:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4934210526315788) internal successors, (758), 304 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 758 transitions. [2022-03-15 19:24:10,182 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 758 transitions. Word has length 25 [2022-03-15 19:24:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:10,182 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 758 transitions. [2022-03-15 19:24:10,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 758 transitions. [2022-03-15 19:24:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 19:24:10,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:10,183 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:10,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 19:24:10,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 19:24:10,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1221656964, now seen corresponding path program 9 times [2022-03-15 19:24:10,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:10,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612753706] [2022-03-15 19:24:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:24:11,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:11,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612753706] [2022-03-15 19:24:11,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612753706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:11,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114115764] [2022-03-15 19:24:11,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:24:11,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:11,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:11,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 19:24:11,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:24:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:24:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 19:24:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:11,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:11,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-03-15 19:24:11,659 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-15 19:24:11,659 INFO L387 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 42 treesize of output 10 [2022-03-15 19:24:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:24:11,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:11,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:11,925 INFO L387 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 151 treesize of output 157 [2022-03-15 19:24:11,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:11,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 100 treesize of output 118 [2022-03-15 19:24:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:24:12,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114115764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:12,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:12,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 29 [2022-03-15 19:24:12,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1355000446] [2022-03-15 19:24:12,483 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:12,486 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:12,496 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 85 transitions. [2022-03-15 19:24:12,496 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:13,157 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10275#(and (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0) (= ~ok~0 1)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= ~queue~0.offset 0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)))] [2022-03-15 19:24:13,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 19:24:13,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 19:24:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=830, Unknown=1, NotChecked=0, Total=992 [2022-03-15 19:24:13,158 INFO L87 Difference]: Start difference. First operand 305 states and 758 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:13,701 INFO L93 Difference]: Finished difference Result 647 states and 1635 transitions. [2022-03-15 19:24:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 19:24:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 19:24:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:13,704 INFO L225 Difference]: With dead ends: 647 [2022-03-15 19:24:13,704 INFO L226 Difference]: Without dead ends: 617 [2022-03-15 19:24:13,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1284, Unknown=1, NotChecked=0, Total=1560 [2022-03-15 19:24:13,704 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:13,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:24:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-03-15 19:24:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 292. [2022-03-15 19:24:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.5051546391752577) internal successors, (729), 291 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 729 transitions. [2022-03-15 19:24:13,711 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 729 transitions. Word has length 25 [2022-03-15 19:24:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:13,711 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 729 transitions. [2022-03-15 19:24:13,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 729 transitions. [2022-03-15 19:24:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 19:24:13,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:13,712 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:13,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:13,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 19:24:13,925 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1689479549, now seen corresponding path program 1 times [2022-03-15 19:24:13,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:13,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956496476] [2022-03-15 19:24:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:13,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:24:13,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:13,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956496476] [2022-03-15 19:24:13,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956496476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:13,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136527032] [2022-03-15 19:24:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:13,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:13,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:13,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 19:24:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:24:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:24:14,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:24:14,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136527032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:14,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:14,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 19:24:14,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1241651275] [2022-03-15 19:24:14,190 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:14,194 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:14,204 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 82 transitions. [2022-03-15 19:24:14,204 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:14,374 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [11689#(< (+ ~i~0 1) ~N~0), 11688#(< ~i~0 ~N~0)] [2022-03-15 19:24:14,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 19:24:14,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 19:24:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-03-15 19:24:14,375 INFO L87 Difference]: Start difference. First operand 292 states and 729 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:14,470 INFO L93 Difference]: Finished difference Result 469 states and 1110 transitions. [2022-03-15 19:24:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:24:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 19:24:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:14,471 INFO L225 Difference]: With dead ends: 469 [2022-03-15 19:24:14,471 INFO L226 Difference]: Without dead ends: 412 [2022-03-15 19:24:14,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-15 19:24:14,472 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:24:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-15 19:24:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 344. [2022-03-15 19:24:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.446064139941691) internal successors, (839), 343 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 839 transitions. [2022-03-15 19:24:14,482 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 839 transitions. Word has length 26 [2022-03-15 19:24:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:14,482 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 839 transitions. [2022-03-15 19:24:14,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 839 transitions. [2022-03-15 19:24:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 19:24:14,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:14,483 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:14,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:14,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 19:24:14,702 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash 53432514, now seen corresponding path program 10 times [2022-03-15 19:24:14,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:14,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099432761] [2022-03-15 19:24:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:14,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:24:15,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:15,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099432761] [2022-03-15 19:24:15,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099432761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:15,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756081941] [2022-03-15 19:24:15,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:24:15,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:15,433 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:15,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 19:24:15,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:24:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:24:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 19:24:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:15,776 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:24:15,776 INFO L387 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 37 treesize of output 44 [2022-03-15 19:24:15,805 INFO L387 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 27 treesize of output 15 [2022-03-15 19:24:15,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 19:24:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:24:15,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:16,080 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_586 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_586) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0))) is different from false [2022-03-15 19:24:16,160 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-03-15 19:24:16,161 INFO L387 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 69 treesize of output 68 [2022-03-15 19:24:16,164 INFO L387 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 29 treesize of output 23 [2022-03-15 19:24:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2022-03-15 19:24:16,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756081941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:16,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:16,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 36 [2022-03-15 19:24:16,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1145916868] [2022-03-15 19:24:16,328 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:16,331 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:16,342 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 82 transitions. [2022-03-15 19:24:16,342 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:17,117 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [13040#(and (or (< ~i~0 ~N~0) (<= ~new~0 ~v_old~0)) (or (= 0 (+ (- 1) ~ok~0)) (< ~i~0 ~N~0)) (or (not (<= ~N~0 0)) (< ~i~0 ~N~0))), 13042#(and (or (not (<= (+ ~queue~0.offset (* ~start~0 4) 1) 0)) (< (+ ~i~0 1) ~N~0)) (or (< (+ ~i~0 1) ~N~0) (< 0 ~N~0)) (or (< (+ ~i~0 1) ~N~0) (= ~queue~0.offset 0)) (or (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< (+ ~i~0 1) ~N~0)) (or (< (+ ~i~0 1) ~N~0) (= ~ok~0 1))), 13039#(and (or (<= 1 ~ok~0) (< ~i~0 ~N~0)) (or (<= (div ~ok~0 256) 0) (< ~i~0 ~N~0))), 13041#(and (or (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< ~i~0 ~N~0)) (or (< ~i~0 ~N~0) (= ~ok~0 1)) (or (< ~i~0 ~N~0) (< 0 ~N~0)) (or (= ~queue~0.offset 0) (< ~i~0 ~N~0)) (or (not (<= (+ ~queue~0.offset (* ~start~0 4) 1) 0)) (< ~i~0 ~N~0)))] [2022-03-15 19:24:17,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 19:24:17,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 19:24:17,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1401, Unknown=1, NotChecked=78, Total=1722 [2022-03-15 19:24:17,120 INFO L87 Difference]: Start difference. First operand 344 states and 839 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:17,894 INFO L93 Difference]: Finished difference Result 1034 states and 2673 transitions. [2022-03-15 19:24:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 19:24:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2022-03-15 19:24:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:17,898 INFO L225 Difference]: With dead ends: 1034 [2022-03-15 19:24:17,898 INFO L226 Difference]: Without dead ends: 961 [2022-03-15 19:24:17,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=2382, Unknown=1, NotChecked=102, Total=2862 [2022-03-15 19:24:17,901 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:17,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:24:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-03-15 19:24:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 343. [2022-03-15 19:24:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.4473684210526314) internal successors, (837), 342 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 837 transitions. [2022-03-15 19:24:17,911 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 837 transitions. Word has length 26 [2022-03-15 19:24:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:17,911 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 837 transitions. [2022-03-15 19:24:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 837 transitions. [2022-03-15 19:24:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 19:24:17,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:17,912 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:17,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:18,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 19:24:18,129 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:18,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1217858796, now seen corresponding path program 11 times [2022-03-15 19:24:18,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:18,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637611573] [2022-03-15 19:24:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:18,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:24:18,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:18,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637611573] [2022-03-15 19:24:18,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637611573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:18,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278402988] [2022-03-15 19:24:18,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:24:18,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:18,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:18,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:18,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 19:24:18,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 19:24:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:24:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 19:24:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:18,898 INFO L353 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-03-15 19:24:18,898 INFO L387 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-03-15 19:24:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:19,120 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-03-15 19:24:19,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2022-03-15 19:24:19,151 INFO L387 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 [2022-03-15 19:24:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:19,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-15 19:24:19,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-15 19:24:19,454 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-15 19:24:19,455 INFO L387 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 34 treesize of output 10 [2022-03-15 19:24:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:24:19,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:19,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:19,857 INFO L387 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 79 [2022-03-15 19:24:19,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:19,864 INFO L387 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 1957 treesize of output 1895 [2022-03-15 19:24:19,904 INFO L353 Elim1Store]: treesize reduction 44, result has 54.6 percent of original size [2022-03-15 19:24:19,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 2627 treesize of output 2560 [2022-03-15 19:24:19,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:19,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2644 treesize of output 2452 [2022-03-15 19:24:19,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:19,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2404 treesize of output 1972 [2022-03-15 19:24:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:26,267 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 117 [2022-03-15 19:24:26,396 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-15 19:24:26,396 INFO L387 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 125 treesize of output 1 [2022-03-15 19:24:26,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:26,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 74 treesize of output 94 [2022-03-15 19:24:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-15 19:24:26,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278402988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:26,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:26,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 34 [2022-03-15 19:24:26,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [242433429] [2022-03-15 19:24:26,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:26,953 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:26,964 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 86 transitions. [2022-03-15 19:24:26,964 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:27,875 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14973#(and (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= 0 (+ (- 1) ~ok~0)) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (<= (+ ~queue~0.offset (* ~start~0 4) 1) 0)) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= ~queue~0.offset 0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)))] [2022-03-15 19:24:27,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 19:24:27,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 19:24:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1118, Unknown=8, NotChecked=0, Total=1332 [2022-03-15 19:24:27,876 INFO L87 Difference]: Start difference. First operand 343 states and 837 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:28,549 INFO L93 Difference]: Finished difference Result 747 states and 1846 transitions. [2022-03-15 19:24:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 19:24:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 19:24:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:28,551 INFO L225 Difference]: With dead ends: 747 [2022-03-15 19:24:28,551 INFO L226 Difference]: Without dead ends: 671 [2022-03-15 19:24:28,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=1729, Unknown=8, NotChecked=0, Total=2070 [2022-03-15 19:24:28,552 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:28,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:24:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-03-15 19:24:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 344. [2022-03-15 19:24:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.446064139941691) internal successors, (839), 343 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 839 transitions. [2022-03-15 19:24:28,567 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 839 transitions. Word has length 26 [2022-03-15 19:24:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:28,567 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 839 transitions. [2022-03-15 19:24:28,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 839 transitions. [2022-03-15 19:24:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 19:24:28,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:28,569 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:28,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:28,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 19:24:28,783 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1428495316, now seen corresponding path program 2 times [2022-03-15 19:24:28,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:28,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594641721] [2022-03-15 19:24:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:24:28,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:28,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594641721] [2022-03-15 19:24:28,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594641721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:24:28,913 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:24:28,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 19:24:28,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1372198676] [2022-03-15 19:24:28,914 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:28,917 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:28,944 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 83 transitions. [2022-03-15 19:24:28,945 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:29,099 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:24:29,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:24:29,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:24:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-15 19:24:29,100 INFO L87 Difference]: Start difference. First operand 344 states and 839 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-03-15 19:24:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:29,259 INFO L93 Difference]: Finished difference Result 405 states and 974 transitions. [2022-03-15 19:24:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 19:24:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 27 [2022-03-15 19:24:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:29,261 INFO L225 Difference]: With dead ends: 405 [2022-03-15 19:24:29,261 INFO L226 Difference]: Without dead ends: 405 [2022-03-15 19:24:29,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 19:24:29,261 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:29,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:24:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-03-15 19:24:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 334. [2022-03-15 19:24:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.4474474474474475) internal successors, (815), 333 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 815 transitions. [2022-03-15 19:24:29,266 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 815 transitions. Word has length 27 [2022-03-15 19:24:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:29,266 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 815 transitions. [2022-03-15 19:24:29,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-03-15 19:24:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 815 transitions. [2022-03-15 19:24:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 19:24:29,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:29,268 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:29,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-15 19:24:29,268 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash -466563972, now seen corresponding path program 12 times [2022-03-15 19:24:29,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:29,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544337916] [2022-03-15 19:24:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:24:29,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:29,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544337916] [2022-03-15 19:24:29,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544337916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:29,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353857630] [2022-03-15 19:24:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:24:29,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:29,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:29,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 19:24:30,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 19:24:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:24:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 19:24:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:30,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-03-15 19:24:30,494 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-15 19:24:30,495 INFO L387 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 42 treesize of output 10 [2022-03-15 19:24:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-15 19:24:30,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:30,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:30,684 INFO L387 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 151 treesize of output 157 [2022-03-15 19:24:30,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:30,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 100 treesize of output 118 [2022-03-15 19:24:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-15 19:24:31,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353857630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:31,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:31,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 28 [2022-03-15 19:24:31,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1849547979] [2022-03-15 19:24:31,219 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:31,223 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:31,236 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 87 transitions. [2022-03-15 19:24:31,236 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:31,793 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17700#(and (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= 0 (+ (- 1) ~ok~0)) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (<= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~start~0 4))) ~v_old~0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)) (or (< ~end~0 0) (not (= (select (select |#memory_int| ~queue~0.base) (+ ~queue~0.offset (* ~end~0 4))) (select (select |#memory_int| ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (= ~queue~0.offset 0) (< ~last~0 |thread1Thread1of1ForFork0_#t~mem1#1|) (<= ~n~0 ~end~0)))] [2022-03-15 19:24:31,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 19:24:31,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:31,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 19:24:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=760, Unknown=1, NotChecked=0, Total=930 [2022-03-15 19:24:31,794 INFO L87 Difference]: Start difference. First operand 334 states and 815 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2022-03-15 19:24:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:32,292 INFO L93 Difference]: Finished difference Result 596 states and 1494 transitions. [2022-03-15 19:24:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 19:24:32,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 27 [2022-03-15 19:24:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:32,294 INFO L225 Difference]: With dead ends: 596 [2022-03-15 19:24:32,294 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 19:24:32,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=1230, Unknown=1, NotChecked=0, Total=1560 [2022-03-15 19:24:32,295 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:32,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:24:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 19:24:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 232. [2022-03-15 19:24:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5324675324675323) internal successors, (585), 231 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 585 transitions. [2022-03-15 19:24:32,300 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 585 transitions. Word has length 27 [2022-03-15 19:24:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:32,301 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 585 transitions. [2022-03-15 19:24:32,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2022-03-15 19:24:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 585 transitions. [2022-03-15 19:24:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 19:24:32,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:32,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:32,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:32,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:32,519 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:32,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1545733244, now seen corresponding path program 13 times [2022-03-15 19:24:32,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:32,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213040559] [2022-03-15 19:24:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:32,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:24:32,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:32,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213040559] [2022-03-15 19:24:32,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213040559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:32,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572459335] [2022-03-15 19:24:32,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:24:32,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:32,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:32,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:32,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 19:24:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:24:32,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:24:32,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:24:32,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572459335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:24:32,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:24:32,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-15 19:24:32,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [421071421] [2022-03-15 19:24:32,838 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:24:32,842 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:24:32,857 INFO L252 McrAutomatonBuilder]: Finished intersection with 66 states and 107 transitions. [2022-03-15 19:24:32,857 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:24:33,068 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:24:33,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:24:33,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:24:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:24:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-15 19:24:33,069 INFO L87 Difference]: Start difference. First operand 232 states and 585 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-15 19:24:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:24:33,140 INFO L93 Difference]: Finished difference Result 294 states and 719 transitions. [2022-03-15 19:24:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 19:24:33,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 29 [2022-03-15 19:24:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:24:33,141 INFO L225 Difference]: With dead ends: 294 [2022-03-15 19:24:33,141 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 19:24:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-15 19:24:33,142 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:24:33,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 4 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:24:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 19:24:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-15 19:24:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5258620689655173) internal successors, (586), 232 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:24:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 586 transitions. [2022-03-15 19:24:33,146 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 586 transitions. Word has length 29 [2022-03-15 19:24:33,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:24:33,146 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 586 transitions. [2022-03-15 19:24:33,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2022-03-15 19:24:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 586 transitions. [2022-03-15 19:24:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 19:24:33,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:24:33,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:24:33,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:33,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:33,347 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 19:24:33,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:24:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash 213471732, now seen corresponding path program 14 times [2022-03-15 19:24:33,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:24:33,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901494680] [2022-03-15 19:24:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:24:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:24:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:24:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:24:33,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:24:33,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901494680] [2022-03-15 19:24:33,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901494680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:24:33,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048611885] [2022-03-15 19:24:33,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:24:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:24:33,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:24:33,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 19:24:34,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:24:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:24:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 19:24:34,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:24:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:34,118 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-03-15 19:24:34,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-03-15 19:24:34,196 INFO L387 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 15 treesize of output 11 [2022-03-15 19:24:34,234 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 19:24:34,234 INFO L387 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 [2022-03-15 19:24:34,262 INFO L387 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 6 treesize of output 5 [2022-03-15 19:24:34,273 INFO L387 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 6 treesize of output 5 [2022-03-15 19:24:34,298 INFO L387 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 6 treesize of output 5 [2022-03-15 19:24:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:34,778 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:24:34,778 INFO L387 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 75 treesize of output 74 [2022-03-15 19:24:34,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:34,792 INFO L387 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 59 treesize of output 45 [2022-03-15 19:24:35,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 19:24:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:24:35,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:35,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 13 [2022-03-15 19:24:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:24:35,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:24:35,216 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_830 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_830) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (<= (select .cse0 (+ .cse1 c_~queue~0.offset 4)) (select .cse0 (+ .cse1 c_~queue~0.offset))))) (forall ((v_ArrVal_830 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_830) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0))) is different from false [2022-03-15 19:24:35,301 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((~i~0 Int)) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* ~i~0 4))))) (or (< c_~last~0 .cse0) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) .cse0))))) (<= c_~n~0 c_~end~0) (< c_~end~0 0) (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_830 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_830) c_~queue~0.base)) (.cse2 (* c_~start~0 4))) (<= (select .cse1 (+ .cse2 c_~queue~0.offset 4)) (select .cse1 (+ .cse2 c_~queue~0.offset))))) (forall ((v_ArrVal_830 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_830) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0)))) is different from false [2022-03-15 19:24:35,326 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~end~0) (< c_~end~0 0) (forall ((v_~i~0_129 Int)) (let ((.cse1 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* v_~i~0_129 4))))) (or (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) .cse0)) (< (select .cse1 (+ c_~A~0.offset (* c_~i~0 4))) .cse0))))) (and (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_830 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_830) c_~queue~0.base)) (.cse3 (* c_~start~0 4))) (<= (select .cse2 (+ .cse3 c_~queue~0.offset 4)) (select .cse2 (+ .cse3 c_~queue~0.offset))))) (forall ((v_ArrVal_830 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_830) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) c_~v_old~0)))) is different from false [2022-03-15 19:24:38,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:24:38,754 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 187 [2022-03-15 19:24:39,088 INFO L353 Elim1Store]: treesize reduction 66, result has 82.3 percent of original size [2022-03-15 19:24:39,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 11921 treesize of output 10771 [2022-03-15 19:24:39,328 INFO L353 Elim1Store]: treesize reduction 51, result has 79.3 percent of original size [2022-03-15 19:24:39,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 10771 treesize of output 9877 [2022-03-15 19:24:39,617 INFO L353 Elim1Store]: treesize reduction 51, result has 79.3 percent of original size [2022-03-15 19:24:39,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 9877 treesize of output 7895 [2022-03-15 19:24:39,821 INFO L387 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 5331 treesize of output 4563 [2022-03-15 19:24:39,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 19:24:39,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4563 treesize of output 4147 [2022-03-15 19:24:40,025 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-15 19:24:40,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 19:24:40,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:24:40,243 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-15 19:24:40,246 INFO L158 Benchmark]: Toolchain (without parser) took 67942.49ms. Allocated memory was 181.4MB in the beginning and 653.3MB in the end (delta: 471.9MB). Free memory was 128.8MB in the beginning and 576.1MB in the end (delta: -447.3MB). Peak memory consumption was 369.8MB. Max. memory is 8.0GB. [2022-03-15 19:24:40,246 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 19:24:40,246 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.50ms. Allocated memory is still 181.4MB. Free memory was 128.5MB in the beginning and 154.3MB in the end (delta: -25.8MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-03-15 19:24:40,247 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.25ms. Allocated memory is still 181.4MB. Free memory was 154.3MB in the beginning and 152.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 19:24:40,247 INFO L158 Benchmark]: Boogie Preprocessor took 39.95ms. Allocated memory is still 181.4MB. Free memory was 152.2MB in the beginning and 150.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 19:24:40,247 INFO L158 Benchmark]: RCFGBuilder took 455.07ms. Allocated memory is still 181.4MB. Free memory was 150.2MB in the beginning and 129.3MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-03-15 19:24:40,247 INFO L158 Benchmark]: TraceAbstraction took 67173.39ms. Allocated memory was 181.4MB in the beginning and 653.3MB in the end (delta: 471.9MB). Free memory was 128.7MB in the beginning and 576.1MB in the end (delta: -447.4MB). Peak memory consumption was 370.4MB. Max. memory is 8.0GB. [2022-03-15 19:24:40,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.50ms. Allocated memory is still 181.4MB. Free memory was 128.5MB in the beginning and 154.3MB in the end (delta: -25.8MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.25ms. Allocated memory is still 181.4MB. Free memory was 154.3MB in the beginning and 152.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.95ms. Allocated memory is still 181.4MB. Free memory was 152.2MB in the beginning and 150.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 455.07ms. Allocated memory is still 181.4MB. Free memory was 150.2MB in the beginning and 129.3MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 67173.39ms. Allocated memory was 181.4MB in the beginning and 653.3MB in the end (delta: 471.9MB). Free memory was 128.7MB in the beginning and 576.1MB in the end (delta: -447.4MB). Peak memory consumption was 370.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 181 PlacesBefore, 28 PlacesAfterwards, 189 TransitionsBefore, 26 TransitionsAfterwards, 690 CoEnabledTransitionPairs, 7 FixpointIterations, 137 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 194 TotalNumberOfCompositions, 1291 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 899, positive: 822, positive conditional: 0, positive unconditional: 822, negative: 77, negative conditional: 0, negative unconditional: 77, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 375, positive: 365, positive conditional: 0, positive unconditional: 365, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 899, positive: 457, positive conditional: 0, positive unconditional: 457, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 375, unknown conditional: 0, unknown unconditional: 375] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-15 19:24:40,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...