/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-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 19:07:30,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 19:07:30,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 19:07:30,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 19:07:30,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 19:07:30,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 19:07:30,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 19:07:30,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 19:07:30,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 19:07:30,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 19:07:30,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 19:07:30,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 19:07:30,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 19:07:30,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 19:07:30,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 19:07:30,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 19:07:30,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 19:07:30,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 19:07:30,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 19:07:30,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 19:07:30,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 19:07:30,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 19:07:30,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 19:07:30,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 19:07:30,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 19:07:30,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 19:07:30,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 19:07:30,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 19:07:30,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 19:07:30,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 19:07:30,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 19:07:30,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 19:07:30,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 19:07:30,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 19:07:30,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 19:07:30,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 19:07:30,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 19:07:30,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 19:07:30,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 19:07:30,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 19:07:30,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 19:07:30,631 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 19:07:30,645 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 19:07:30,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 19:07:30,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 19:07:30,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 19:07:30,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 19:07:30,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 19:07:30,646 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 19:07:30,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 19:07:30,646 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 19:07:30,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 19:07:30,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 19:07:30,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 19:07:30,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 19:07:30,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 19:07:30,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 19:07:30,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 19:07:30,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 19:07:30,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 19:07:30,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 19:07:30,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-15 19:07:30,850 INFO L275 PluginConnector]: CDTParser initialized [2022-03-15 19:07:30,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-03-15 19:07:30,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d4ddd562/583fbc9ab7bf4b209893795042650313/FLAGb4517322e [2022-03-15 19:07:31,245 INFO L306 CDTParser]: Found 1 translation units. [2022-03-15 19:07:31,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-03-15 19:07:31,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d4ddd562/583fbc9ab7bf4b209893795042650313/FLAGb4517322e [2022-03-15 19:07:31,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d4ddd562/583fbc9ab7bf4b209893795042650313 [2022-03-15 19:07:31,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 19:07:31,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-15 19:07:31,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-15 19:07:31,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-15 19:07:31,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-15 19:07:31,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5dc42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31, skipping insertion in model container [2022-03-15 19:07:31,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-15 19:07:31,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-15 19:07:31,506 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-bad-ring.wvr.c[3947,3960] [2022-03-15 19:07:31,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 19:07:31,515 INFO L203 MainTranslator]: Completed pre-run [2022-03-15 19:07:31,535 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-bad-ring.wvr.c[3947,3960] [2022-03-15 19:07:31,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 19:07:31,546 INFO L208 MainTranslator]: Completed translation [2022-03-15 19:07:31,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31 WrapperNode [2022-03-15 19:07:31,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-15 19:07:31,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 19:07:31,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 19:07:31,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 19:07:31,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,584 INFO L137 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-03-15 19:07:31,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 19:07:31,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 19:07:31,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 19:07:31,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 19:07:31,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 19:07:31,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 19:07:31,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 19:07:31,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 19:07:31,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (1/1) ... [2022-03-15 19:07:31,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 19:07:31,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:31,664 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 19:07:31,692 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 19:07:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-15 19:07:31,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 19:07:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 19:07:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 19:07:31,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-15 19:07:31,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-03-15 19:07:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-03-15 19:07:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-15 19:07:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 19:07:31,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 19:07:31,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-15 19:07:31,706 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 19:07:31,792 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 19:07:31,793 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 19:07:32,222 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 19:07:32,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 19:07:32,327 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-15 19:07:32,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 07:07:32 BoogieIcfgContainer [2022-03-15 19:07:32,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 19:07:32,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 19:07:32,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 19:07:32,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 19:07:32,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.03 07:07:31" (1/3) ... [2022-03-15 19:07:32,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbfc366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 07:07:32, skipping insertion in model container [2022-03-15 19:07:32,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:07:31" (2/3) ... [2022-03-15 19:07:32,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbfc366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 07:07:32, skipping insertion in model container [2022-03-15 19:07:32,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 07:07:32" (3/3) ... [2022-03-15 19:07:32,337 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-03-15 19:07:32,341 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 19:07:32,341 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 19:07:32,341 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 19:07:32,341 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 19:07:32,380 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,394 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,394 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,394 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,394 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,397 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,399 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,399 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,400 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,401 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,402 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,403 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,416 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,416 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,422 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,422 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,422 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,422 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,424 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:07:32,426 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 19:07:32,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 19:07:32,465 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 19:07:32,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 19:07:32,482 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 19:07:32,488 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 267 transitions, 558 flow [2022-03-15 19:07:32,492 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 267 transitions, 558 flow [2022-03-15 19:07:32,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-03-15 19:07:32,587 INFO L129 PetriNetUnfolder]: 22/264 cut-off events. [2022-03-15 19:07:32,587 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-03-15 19:07:32,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-03-15 19:07:32,596 INFO L116 LiptonReduction]: Number of co-enabled transitions 1962 [2022-03-15 19:07:40,000 INFO L131 LiptonReduction]: Checked pairs total: 3585 [2022-03-15 19:07:40,000 INFO L133 LiptonReduction]: Total number of compositions: 278 [2022-03-15 19:07:40,006 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 37 transitions, 98 flow [2022-03-15 19:07:40,032 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 215 states, 214 states have (on average 3.607476635514019) internal successors, (772), 214 states have internal predecessors, (772), 0 states have call successors, (0), 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 19:07:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 214 states have (on average 3.607476635514019) internal successors, (772), 214 states have internal predecessors, (772), 0 states have call successors, (0), 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 19:07:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 19:07:40,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:40,042 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 19:07:40,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:40,045 INFO L85 PathProgramCache]: Analyzing trace with hash 908997770, now seen corresponding path program 1 times [2022-03-15 19:07:40,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:40,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295976244] [2022-03-15 19:07:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:40,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:40,277 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 19:07:40,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:40,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295976244] [2022-03-15 19:07:40,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295976244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:40,278 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:40,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 19:07:40,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [60055590] [2022-03-15 19:07:40,280 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:40,286 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:40,313 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 106 transitions. [2022-03-15 19:07:40,317 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:40,385 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:40,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-15 19:07:40,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-15 19:07:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-15 19:07:40,404 INFO L87 Difference]: Start difference. First operand has 215 states, 214 states have (on average 3.607476635514019) internal successors, (772), 214 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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 19:07:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:40,449 INFO L93 Difference]: Finished difference Result 215 states and 682 transitions. [2022-03-15 19:07:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-15 19:07:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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 22 [2022-03-15 19:07:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:40,460 INFO L225 Difference]: With dead ends: 215 [2022-03-15 19:07:40,460 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 19:07:40,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-15 19:07:40,464 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:40,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:07:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 19:07:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-15 19:07:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.1869158878504673) internal successors, (682), 214 states have internal predecessors, (682), 0 states have call successors, (0), 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 19:07:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 682 transitions. [2022-03-15 19:07:40,499 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 682 transitions. Word has length 22 [2022-03-15 19:07:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 682 transitions. [2022-03-15 19:07:40,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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 19:07:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 682 transitions. [2022-03-15 19:07:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 19:07:40,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:40,501 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, 1, 1] [2022-03-15 19:07:40,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 19:07:40,501 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1124221223, now seen corresponding path program 1 times [2022-03-15 19:07:40,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:40,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146910006] [2022-03-15 19:07:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:40,586 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 19:07:40,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:40,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146910006] [2022-03-15 19:07:40,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146910006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:40,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:40,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 19:07:40,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1504014731] [2022-03-15 19:07:40,586 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:40,590 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:40,606 INFO L252 McrAutomatonBuilder]: Finished intersection with 76 states and 147 transitions. [2022-03-15 19:07:40,606 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:41,420 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:41,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:07:41,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:07:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:07:41,421 INFO L87 Difference]: Start difference. First operand 215 states and 682 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 19:07:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:41,513 INFO L93 Difference]: Finished difference Result 310 states and 898 transitions. [2022-03-15 19:07:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 19:07:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 19:07:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:41,515 INFO L225 Difference]: With dead ends: 310 [2022-03-15 19:07:41,515 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 19:07:41,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 19:07:41,516 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:41,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:07:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 19:07:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-03-15 19:07:41,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.1767441860465118) internal successors, (683), 215 states have internal predecessors, (683), 0 states have call successors, (0), 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 19:07:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 683 transitions. [2022-03-15 19:07:41,525 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 683 transitions. Word has length 24 [2022-03-15 19:07:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:41,525 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 683 transitions. [2022-03-15 19:07:41,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 19:07:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 683 transitions. [2022-03-15 19:07:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 19:07:41,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:41,527 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, 1, 1, 1] [2022-03-15 19:07:41,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 19:07:41,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2010030754, now seen corresponding path program 1 times [2022-03-15 19:07:41,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:41,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105260085] [2022-03-15 19:07:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:07:41,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:41,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105260085] [2022-03-15 19:07:41,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105260085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:41,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:41,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:07:41,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [788409961] [2022-03-15 19:07:41,627 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:41,631 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:41,649 INFO L252 McrAutomatonBuilder]: Finished intersection with 77 states and 148 transitions. [2022-03-15 19:07:41,649 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:41,722 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 13 treesize of output 5 [2022-03-15 19:07:41,930 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:42,003 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:42,313 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:42,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:07:42,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:07:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:07:42,314 INFO L87 Difference]: Start difference. First operand 216 states and 683 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:42,398 INFO L93 Difference]: Finished difference Result 405 states and 1159 transitions. [2022-03-15 19:07:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 19:07:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 19:07:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:42,400 INFO L225 Difference]: With dead ends: 405 [2022-03-15 19:07:42,400 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 19:07:42,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 19:07:42,401 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:42,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:07:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 19:07:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-15 19:07:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.1666666666666665) internal successors, (684), 216 states have internal predecessors, (684), 0 states have call successors, (0), 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 19:07:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 684 transitions. [2022-03-15 19:07:42,408 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 684 transitions. Word has length 25 [2022-03-15 19:07:42,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:42,408 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 684 transitions. [2022-03-15 19:07:42,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 684 transitions. [2022-03-15 19:07:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 19:07:42,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:42,409 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, 1, 1, 1, 1] [2022-03-15 19:07:42,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 19:07:42,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1759412970, now seen corresponding path program 1 times [2022-03-15 19:07:42,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:42,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072618851] [2022-03-15 19:07:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:42,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:42,456 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 19:07:42,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:42,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072618851] [2022-03-15 19:07:42,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072618851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:42,456 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:42,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:07:42,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1877930992] [2022-03-15 19:07:42,457 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:42,461 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:42,498 INFO L252 McrAutomatonBuilder]: Finished intersection with 78 states and 149 transitions. [2022-03-15 19:07:42,498 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:42,612 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 13 treesize of output 5 [2022-03-15 19:07:42,666 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:42,714 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:42,747 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:42,819 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:42,969 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:07:43,093 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:07:43,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:07:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:07:43,095 INFO L87 Difference]: Start difference. First operand 217 states and 684 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 19:07:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:43,167 INFO L93 Difference]: Finished difference Result 385 states and 1143 transitions. [2022-03-15 19:07:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 19:07:43,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 26 [2022-03-15 19:07:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:43,168 INFO L225 Difference]: With dead ends: 385 [2022-03-15 19:07:43,168 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 19:07:43,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 19:07:43,169 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:43,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:07:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 19:07:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-15 19:07:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.1566820276497696) internal successors, (685), 217 states have internal predecessors, (685), 0 states have call successors, (0), 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 19:07:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 685 transitions. [2022-03-15 19:07:43,174 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 685 transitions. Word has length 26 [2022-03-15 19:07:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:43,175 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 685 transitions. [2022-03-15 19:07:43,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 19:07:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 685 transitions. [2022-03-15 19:07:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 19:07:43,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:43,176 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, 1, 1, 1, 1, 1] [2022-03-15 19:07:43,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 19:07:43,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1802873172, now seen corresponding path program 1 times [2022-03-15 19:07:43,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:43,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511589603] [2022-03-15 19:07:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:07:43,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:43,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511589603] [2022-03-15 19:07:43,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511589603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:43,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:43,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 19:07:43,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1834826764] [2022-03-15 19:07:43,269 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:43,274 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:43,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 79 states and 150 transitions. [2022-03-15 19:07:43,293 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:43,388 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 13 treesize of output 5 [2022-03-15 19:07:43,477 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 13 treesize of output 5 [2022-03-15 19:07:43,526 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 13 treesize of output 5 [2022-03-15 19:07:43,866 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3758#(or (< ~q2_front~0 0) (<= ~q2_back~0 ~q2_front~0))] [2022-03-15 19:07:43,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:07:43,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:43,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:07:43,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:07:43,867 INFO L87 Difference]: Start difference. First operand 218 states and 685 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 19:07:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:43,915 INFO L93 Difference]: Finished difference Result 254 states and 799 transitions. [2022-03-15 19:07:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 19:07:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 19:07:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:43,917 INFO L225 Difference]: With dead ends: 254 [2022-03-15 19:07:43,917 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 19:07:43,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:07:43,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:43,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:07:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 19:07:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-15 19:07:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.158102766798419) internal successors, (799), 253 states have internal predecessors, (799), 0 states have call successors, (0), 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 19:07:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 799 transitions. [2022-03-15 19:07:43,923 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 799 transitions. Word has length 27 [2022-03-15 19:07:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:43,923 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 799 transitions. [2022-03-15 19:07:43,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 19:07:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 799 transitions. [2022-03-15 19:07:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 19:07:43,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:43,924 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, 1, 1, 1, 1, 1] [2022-03-15 19:07:43,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 19:07:43,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 603410900, now seen corresponding path program 2 times [2022-03-15 19:07:43,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:43,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438508642] [2022-03-15 19:07:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:07:43,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:43,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438508642] [2022-03-15 19:07:43,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438508642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:44,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:44,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 19:07:44,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1962531488] [2022-03-15 19:07:44,000 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:44,004 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:44,019 INFO L252 McrAutomatonBuilder]: Finished intersection with 68 states and 116 transitions. [2022-03-15 19:07:44,019 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:44,421 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:44,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 19:07:44,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 19:07:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 19:07:44,422 INFO L87 Difference]: Start difference. First operand 254 states and 799 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:44,476 INFO L93 Difference]: Finished difference Result 449 states and 1420 transitions. [2022-03-15 19:07:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 19:07:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 19:07:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:44,478 INFO L225 Difference]: With dead ends: 449 [2022-03-15 19:07:44,478 INFO L226 Difference]: Without dead ends: 354 [2022-03-15 19:07:44,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 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 19:07:44,479 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:44,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:07:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-03-15 19:07:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 304. [2022-03-15 19:07:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.184818481848185) internal successors, (965), 303 states have internal predecessors, (965), 0 states have call successors, (0), 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 19:07:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 965 transitions. [2022-03-15 19:07:44,485 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 965 transitions. Word has length 27 [2022-03-15 19:07:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 965 transitions. [2022-03-15 19:07:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 965 transitions. [2022-03-15 19:07:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 19:07:44,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:44,486 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:44,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 19:07:44,487 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 922473650, now seen corresponding path program 1 times [2022-03-15 19:07:44,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:44,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701867990] [2022-03-15 19:07:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:44,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:44,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701867990] [2022-03-15 19:07:44,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701867990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:44,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943842055] [2022-03-15 19:07:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:44,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:44,557 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 19:07:44,579 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 19:07:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:44,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:07:44,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:07:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:07:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:44,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943842055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:07:44,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:07:44,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-03-15 19:07:44,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [747784750] [2022-03-15 19:07:44,832 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:44,837 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:44,875 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 118 transitions. [2022-03-15 19:07:44,875 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:45,150 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:45,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:07:45,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:07:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 19:07:45,151 INFO L87 Difference]: Start difference. First operand 304 states and 965 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:45,252 INFO L93 Difference]: Finished difference Result 510 states and 1552 transitions. [2022-03-15 19:07:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 19:07:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 19:07:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:45,253 INFO L225 Difference]: With dead ends: 510 [2022-03-15 19:07:45,254 INFO L226 Difference]: Without dead ends: 305 [2022-03-15 19:07:45,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-15 19:07:45,254 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:45,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:07:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-15 19:07:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-03-15 19:07:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1776315789473686) internal successors, (966), 304 states have internal predecessors, (966), 0 states have call successors, (0), 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 19:07:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 966 transitions. [2022-03-15 19:07:45,260 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 966 transitions. Word has length 29 [2022-03-15 19:07:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:45,260 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 966 transitions. [2022-03-15 19:07:45,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 966 transitions. [2022-03-15 19:07:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 19:07:45,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:45,261 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:45,281 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 19:07:45,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:45,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:45,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -55000357, now seen corresponding path program 2 times [2022-03-15 19:07:45,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:45,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210149583] [2022-03-15 19:07:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 19:07:45,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:45,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210149583] [2022-03-15 19:07:45,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210149583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:45,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:45,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 19:07:45,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [607169334] [2022-03-15 19:07:45,573 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:45,579 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:45,599 INFO L252 McrAutomatonBuilder]: Finished intersection with 71 states and 119 transitions. [2022-03-15 19:07:45,600 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:45,657 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 13 treesize of output 5 [2022-03-15 19:07:45,792 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 13 treesize of output 5 [2022-03-15 19:07:45,909 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:45,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 19:07:45,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 19:07:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 19:07:45,910 INFO L87 Difference]: Start difference. First operand 305 states and 966 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:45,962 INFO L93 Difference]: Finished difference Result 257 states and 804 transitions. [2022-03-15 19:07:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 19:07:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 19:07:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:45,964 INFO L225 Difference]: With dead ends: 257 [2022-03-15 19:07:45,964 INFO L226 Difference]: Without dead ends: 257 [2022-03-15 19:07:45,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 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 19:07:45,965 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:45,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:07:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-15 19:07:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-03-15 19:07:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.140625) internal successors, (804), 256 states have internal predecessors, (804), 0 states have call successors, (0), 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 19:07:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 804 transitions. [2022-03-15 19:07:45,971 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 804 transitions. Word has length 30 [2022-03-15 19:07:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:45,971 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 804 transitions. [2022-03-15 19:07:45,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:07:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 804 transitions. [2022-03-15 19:07:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 19:07:45,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:45,972 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:45,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 19:07:45,972 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:45,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1590791523, now seen corresponding path program 3 times [2022-03-15 19:07:45,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:45,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867897721] [2022-03-15 19:07:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:45,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:46,329 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 19:07:46,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:46,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867897721] [2022-03-15 19:07:46,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867897721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:46,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757946829] [2022-03-15 19:07:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:07:46,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:46,343 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 19:07:46,344 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 19:07:46,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:07:46,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:07:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 19:07:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:07:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:46,692 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 19:07:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:46,752 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 19:07:46,817 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 19:07:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:07:46,937 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q1_back~0 c_~n1~0)) (forall ((v_ArrVal_320 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_320) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2022-03-15 19:07:46,954 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q1_back~0 c_~n1~0)) (forall ((v_ArrVal_319 (Array Int Int)) (v_ArrVal_320 (Array Int Int))) (< 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_320) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2022-03-15 19:07:46,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:46,968 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 80 treesize of output 80 [2022-03-15 19:07:46,974 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 32 treesize of output 26 [2022-03-15 19:07:46,977 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 54 treesize of output 42 [2022-03-15 19:07:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:47,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757946829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:07:47,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:07:47,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2022-03-15 19:07:47,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [860504279] [2022-03-15 19:07:47,192 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:47,201 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:47,222 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 69 transitions. [2022-03-15 19:07:47,222 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:47,541 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:47,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:07:47,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:07:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=633, Unknown=2, NotChecked=106, Total=870 [2022-03-15 19:07:47,542 INFO L87 Difference]: Start difference. First operand 257 states and 804 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 19:07:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:48,067 INFO L93 Difference]: Finished difference Result 729 states and 2324 transitions. [2022-03-15 19:07:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:07:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 19:07:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:48,071 INFO L225 Difference]: With dead ends: 729 [2022-03-15 19:07:48,071 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 19:07:48,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=1049, Unknown=2, NotChecked=138, Total=1406 [2022-03-15 19:07:48,071 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:48,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:07:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 19:07:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 497. [2022-03-15 19:07:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.342741935483871) internal successors, (1658), 496 states have internal predecessors, (1658), 0 states have call successors, (0), 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 19:07:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1658 transitions. [2022-03-15 19:07:48,083 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1658 transitions. Word has length 30 [2022-03-15 19:07:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:48,083 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1658 transitions. [2022-03-15 19:07:48,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 19:07:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1658 transitions. [2022-03-15 19:07:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 19:07:48,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:48,084 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:48,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 19:07:48,299 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,SelfDestructingSolverStorable8 [2022-03-15 19:07:48,300 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1885712859, now seen corresponding path program 4 times [2022-03-15 19:07:48,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:48,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538912626] [2022-03-15 19:07:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:07:48,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:48,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538912626] [2022-03-15 19:07:48,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538912626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:07:48,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:07:48,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 19:07:48,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [477099213] [2022-03-15 19:07:48,400 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:48,405 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:48,462 INFO L252 McrAutomatonBuilder]: Finished intersection with 89 states and 176 transitions. [2022-03-15 19:07:48,462 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:48,481 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 12 treesize of output 4 [2022-03-15 19:07:48,846 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9604#(< ~q1_back~0 0)] [2022-03-15 19:07:48,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:07:48,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:07:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:07:48,847 INFO L87 Difference]: Start difference. First operand 497 states and 1658 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 19:07:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:48,894 INFO L93 Difference]: Finished difference Result 303 states and 921 transitions. [2022-03-15 19:07:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 19:07:48,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 19:07:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:48,896 INFO L225 Difference]: With dead ends: 303 [2022-03-15 19:07:48,896 INFO L226 Difference]: Without dead ends: 303 [2022-03-15 19:07:48,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 19 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 19:07:48,896 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:48,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:07:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-15 19:07:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-03-15 19:07:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0496688741721854) internal successors, (921), 302 states have internal predecessors, (921), 0 states have call successors, (0), 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 19:07:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 921 transitions. [2022-03-15 19:07:48,902 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 921 transitions. Word has length 30 [2022-03-15 19:07:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:48,902 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 921 transitions. [2022-03-15 19:07:48,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 19:07:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 921 transitions. [2022-03-15 19:07:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 19:07:48,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:48,903 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:48,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 19:07:48,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1827714668, now seen corresponding path program 5 times [2022-03-15 19:07:48,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:48,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205617864] [2022-03-15 19:07:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:48,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:49,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:49,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205617864] [2022-03-15 19:07:49,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205617864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:49,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343845585] [2022-03-15 19:07:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:07:49,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:49,305 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 19:07:49,306 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 19:07:49,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 19:07:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:07:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 19:07:49,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:07:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:49,734 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 19:07:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:49,779 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 19:07:49,823 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 19:07:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:07:49,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:07:50,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:50,229 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 158 treesize of output 150 [2022-03-15 19:07:50,233 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 65 treesize of output 53 [2022-03-15 19:07:50,237 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 118 treesize of output 94 [2022-03-15 19:07:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:07:50,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343845585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:07:50,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:07:50,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 34 [2022-03-15 19:07:50,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [135820879] [2022-03-15 19:07:50,610 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:50,615 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:50,642 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 70 transitions. [2022-03-15 19:07:50,643 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:51,286 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:51,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:07:51,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:07:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1027, Unknown=15, NotChecked=0, Total=1190 [2022-03-15 19:07:51,303 INFO L87 Difference]: Start difference. First operand 303 states and 921 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 19:07:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:52,587 INFO L93 Difference]: Finished difference Result 817 states and 2451 transitions. [2022-03-15 19:07:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 19:07:52,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 31 [2022-03-15 19:07:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:52,591 INFO L225 Difference]: With dead ends: 817 [2022-03-15 19:07:52,591 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 19:07:52,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=1938, Unknown=15, NotChecked=0, Total=2256 [2022-03-15 19:07:52,592 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 157 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:52,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 0 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:07:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 19:07:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 304. [2022-03-15 19:07:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.046204620462046) internal successors, (923), 303 states have internal predecessors, (923), 0 states have call successors, (0), 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 19:07:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 923 transitions. [2022-03-15 19:07:52,616 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 923 transitions. Word has length 31 [2022-03-15 19:07:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:52,616 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 923 transitions. [2022-03-15 19:07:52,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 19:07:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 923 transitions. [2022-03-15 19:07:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 19:07:52,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:52,618 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:52,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 19:07:52,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:52,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1986102963, now seen corresponding path program 1 times [2022-03-15 19:07:52,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:52,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173871253] [2022-03-15 19:07:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:07:52,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:52,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173871253] [2022-03-15 19:07:52,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173871253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:52,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471544677] [2022-03-15 19:07:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:52,972 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 19:07:52,973 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 19:07:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:53,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:07:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:07:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:07:53,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:07:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:07:53,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471544677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:07:53,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:07:53,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-15 19:07:53,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1295329917] [2022-03-15 19:07:53,390 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:53,411 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:53,438 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 83 transitions. [2022-03-15 19:07:53,439 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:53,608 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 13 treesize of output 5 [2022-03-15 19:07:53,803 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:53,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:07:53,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:07:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-15 19:07:53,804 INFO L87 Difference]: Start difference. First operand 304 states and 923 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 19:07:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:53,956 INFO L93 Difference]: Finished difference Result 600 states and 1683 transitions. [2022-03-15 19:07:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 19:07:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 32 [2022-03-15 19:07:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:53,958 INFO L225 Difference]: With dead ends: 600 [2022-03-15 19:07:53,958 INFO L226 Difference]: Without dead ends: 397 [2022-03-15 19:07:53,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-15 19:07:53,958 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:53,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:07:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-03-15 19:07:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 357. [2022-03-15 19:07:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9101123595505616) internal successors, (1036), 356 states have internal predecessors, (1036), 0 states have call successors, (0), 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 19:07:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1036 transitions. [2022-03-15 19:07:53,964 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1036 transitions. Word has length 32 [2022-03-15 19:07:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:53,965 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1036 transitions. [2022-03-15 19:07:53,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 19:07:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1036 transitions. [2022-03-15 19:07:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 19:07:53,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:53,965 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:54,013 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 19:07:54,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:54,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash -582397571, now seen corresponding path program 6 times [2022-03-15 19:07:54,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:54,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731003848] [2022-03-15 19:07:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:54,587 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 19:07:54,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:54,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731003848] [2022-03-15 19:07:54,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731003848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:54,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313693009] [2022-03-15 19:07:54,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:07:54,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:54,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:54,593 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 19:07:54,594 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 19:07:54,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 19:07:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:07:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 19:07:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:07:54,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:54,846 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 19:07:54,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:54,878 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 19:07:54,923 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 19:07:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 19:07:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:07:55,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_560 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_560) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2022-03-15 19:07:55,049 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_559 (Array Int Int)) (v_ArrVal_560 (Array Int Int))) (< 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_559) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_560) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2022-03-15 19:07:55,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:55,060 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 158 treesize of output 150 [2022-03-15 19:07:55,064 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 130 treesize of output 106 [2022-03-15 19:07:55,068 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 106 treesize of output 94 [2022-03-15 19:07:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-15 19:07:55,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313693009] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:55,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:07:55,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 27 [2022-03-15 19:07:55,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [683908818] [2022-03-15 19:07:55,303 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:07:55,313 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:07:55,341 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 71 transitions. [2022-03-15 19:07:55,341 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:07:55,464 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:07:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 19:07:55,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:07:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 19:07:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=571, Unknown=2, NotChecked=98, Total=756 [2022-03-15 19:07:55,465 INFO L87 Difference]: Start difference. First operand 357 states and 1036 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 19:07:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:07:55,656 INFO L93 Difference]: Finished difference Result 357 states and 1024 transitions. [2022-03-15 19:07:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 19:07:55,657 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 32 [2022-03-15 19:07:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:07:55,658 INFO L225 Difference]: With dead ends: 357 [2022-03-15 19:07:55,658 INFO L226 Difference]: Without dead ends: 306 [2022-03-15 19:07:55,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=719, Unknown=2, NotChecked=110, Total=930 [2022-03-15 19:07:55,659 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:07:55,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 187 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-03-15 19:07:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-15 19:07:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-15 19:07:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0131147540983605) internal successors, (919), 305 states have internal predecessors, (919), 0 states have call successors, (0), 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 19:07:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 919 transitions. [2022-03-15 19:07:55,664 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 919 transitions. Word has length 32 [2022-03-15 19:07:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:07:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 919 transitions. [2022-03-15 19:07:55,664 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 19:07:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 919 transitions. [2022-03-15 19:07:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 19:07:55,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:07:55,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:07:55,702 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 19:07:55,886 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,SelfDestructingSolverStorable12 [2022-03-15 19:07:55,886 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:07:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:07:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1540436775, now seen corresponding path program 2 times [2022-03-15 19:07:55,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:07:55,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065760422] [2022-03-15 19:07:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:07:55,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:07:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:07:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:07:56,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:07:56,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065760422] [2022-03-15 19:07:56,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065760422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:07:56,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117284091] [2022-03-15 19:07:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:07:56,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:07:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:07:56,412 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 19:07:56,413 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 19:07:56,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:07:56,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:07:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 19:07:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:07:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:56,791 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 19:07:56,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:07:56,830 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 19:07:56,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:56,965 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 46 treesize of output 33 [2022-03-15 19:07:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:07:57,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:07:57,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:57,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 965 treesize of output 929 [2022-03-15 19:07:57,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:57,401 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 817 treesize of output 661 [2022-03-15 19:07:57,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:07:57,439 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 592 treesize of output 538 [2022-03-15 19:08:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:08:00,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117284091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:08:00,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:08:00,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2022-03-15 19:08:00,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [260530636] [2022-03-15 19:08:00,015 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:00,021 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:00,085 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 84 transitions. [2022-03-15 19:08:00,085 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:01,089 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:08:01,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 19:08:01,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 19:08:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1528, Unknown=10, NotChecked=0, Total=1722 [2022-03-15 19:08:01,090 INFO L87 Difference]: Start difference. First operand 306 states and 919 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:08:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:03,516 INFO L93 Difference]: Finished difference Result 867 states and 2905 transitions. [2022-03-15 19:08:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 19:08:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 19:08:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:03,520 INFO L225 Difference]: With dead ends: 867 [2022-03-15 19:08:03,520 INFO L226 Difference]: Without dead ends: 839 [2022-03-15 19:08:03,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 48 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=501, Invalid=3271, Unknown=10, NotChecked=0, Total=3782 [2022-03-15 19:08:03,522 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 284 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:03,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 0 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:08:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-03-15 19:08:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 566. [2022-03-15 19:08:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 3.426548672566372) internal successors, (1936), 565 states have internal predecessors, (1936), 0 states have call successors, (0), 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 19:08:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1936 transitions. [2022-03-15 19:08:03,533 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1936 transitions. Word has length 33 [2022-03-15 19:08:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:03,533 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1936 transitions. [2022-03-15 19:08:03,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:08:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1936 transitions. [2022-03-15 19:08:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 19:08:03,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:03,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:03,552 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 19:08:03,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:03,752 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -84554479, now seen corresponding path program 3 times [2022-03-15 19:08:03,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:03,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182310717] [2022-03-15 19:08:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:03,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:08:03,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:03,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182310717] [2022-03-15 19:08:03,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182310717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:08:03,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:08:03,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:08:03,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [333583390] [2022-03-15 19:08:03,838 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:03,857 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:03,892 INFO L252 McrAutomatonBuilder]: Finished intersection with 71 states and 117 transitions. [2022-03-15 19:08:03,892 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:04,170 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:08:04,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:08:04,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:04,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:08:04,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:08:04,171 INFO L87 Difference]: Start difference. First operand 566 states and 1936 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:08:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:04,236 INFO L93 Difference]: Finished difference Result 839 states and 2869 transitions. [2022-03-15 19:08:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 19:08:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 19:08:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:04,239 INFO L225 Difference]: With dead ends: 839 [2022-03-15 19:08:04,239 INFO L226 Difference]: Without dead ends: 811 [2022-03-15 19:08:04,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:08:04,240 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:04,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:08:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-03-15 19:08:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 747. [2022-03-15 19:08:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.5281501340482575) internal successors, (2632), 746 states have internal predecessors, (2632), 0 states have call successors, (0), 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 19:08:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2632 transitions. [2022-03-15 19:08:04,253 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2632 transitions. Word has length 33 [2022-03-15 19:08:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:04,253 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2632 transitions. [2022-03-15 19:08:04,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:08:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2632 transitions. [2022-03-15 19:08:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 19:08:04,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:04,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:04,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-15 19:08:04,255 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1830573657, now seen corresponding path program 4 times [2022-03-15 19:08:04,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:04,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998881713] [2022-03-15 19:08:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:08:04,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:04,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998881713] [2022-03-15 19:08:04,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998881713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:08:04,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817490178] [2022-03-15 19:08:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:08:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:08:04,803 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 19:08:04,804 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 19:08:04,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:08:04,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:08:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 19:08:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:08:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:05,325 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 19 treesize of output 21 [2022-03-15 19:08:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:05,564 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 19:08:05,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2022-03-15 19:08:05,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:05,759 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 44 treesize of output 66 [2022-03-15 19:08:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:08:05,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:08:06,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:06,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 263 treesize of output 315 [2022-03-15 19:08:06,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:06,444 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 203 treesize of output 215 [2022-03-15 19:08:06,452 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 118 treesize of output 94 [2022-03-15 19:08:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:08:17,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817490178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:08:17,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:08:17,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 47 [2022-03-15 19:08:17,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1448201651] [2022-03-15 19:08:17,173 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:17,181 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:17,198 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2022-03-15 19:08:17,198 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:17,541 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:08:17,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 19:08:17,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 19:08:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2021, Unknown=5, NotChecked=0, Total=2256 [2022-03-15 19:08:17,542 INFO L87 Difference]: Start difference. First operand 747 states and 2632 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 19:08:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:19,883 INFO L93 Difference]: Finished difference Result 1358 states and 4427 transitions. [2022-03-15 19:08:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 19:08:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 33 [2022-03-15 19:08:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:19,889 INFO L225 Difference]: With dead ends: 1358 [2022-03-15 19:08:19,889 INFO L226 Difference]: Without dead ends: 1306 [2022-03-15 19:08:19,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=592, Invalid=4233, Unknown=5, NotChecked=0, Total=4830 [2022-03-15 19:08:19,891 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 213 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:19,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 0 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:08:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-03-15 19:08:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 740. [2022-03-15 19:08:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.5453315290933696) internal successors, (2620), 739 states have internal predecessors, (2620), 0 states have call successors, (0), 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 19:08:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2620 transitions. [2022-03-15 19:08:19,911 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2620 transitions. Word has length 33 [2022-03-15 19:08:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:19,911 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2620 transitions. [2022-03-15 19:08:19,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 19:08:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2620 transitions. [2022-03-15 19:08:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:08:19,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:19,912 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:19,932 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 19:08:20,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:20,126 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash -805981043, now seen corresponding path program 5 times [2022-03-15 19:08:20,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:20,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281056752] [2022-03-15 19:08:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:20,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:20,964 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 19:08:20,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:20,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281056752] [2022-03-15 19:08:20,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281056752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:08:20,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100668409] [2022-03-15 19:08:20,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:08:20,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:08:20,966 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 19:08:20,967 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 19:08:21,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 19:08:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:08:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 19:08:21,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:08:21,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:21,264 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 19 treesize of output 21 [2022-03-15 19:08:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:21,304 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 19 treesize of output 21 [2022-03-15 19:08:21,542 INFO L353 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2022-03-15 19:08:21,544 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 45 treesize of output 36 [2022-03-15 19:08:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:08:21,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 19:08:21,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100668409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:08:21,579 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 19:08:21,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 28 [2022-03-15 19:08:21,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1096598733] [2022-03-15 19:08:21,579 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:21,585 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:21,615 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 85 transitions. [2022-03-15 19:08:21,615 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:21,955 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:08:21,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:08:21,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:08:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-03-15 19:08:21,956 INFO L87 Difference]: Start difference. First operand 740 states and 2620 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 19:08:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:22,282 INFO L93 Difference]: Finished difference Result 776 states and 2680 transitions. [2022-03-15 19:08:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:08:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 34 [2022-03-15 19:08:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:22,286 INFO L225 Difference]: With dead ends: 776 [2022-03-15 19:08:22,286 INFO L226 Difference]: Without dead ends: 776 [2022-03-15 19:08:22,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-03-15 19:08:22,287 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:22,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 219 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-03-15 19:08:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-15 19:08:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 752. [2022-03-15 19:08:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.5126498002663116) internal successors, (2638), 751 states have internal predecessors, (2638), 0 states have call successors, (0), 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 19:08:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2638 transitions. [2022-03-15 19:08:22,301 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2638 transitions. Word has length 34 [2022-03-15 19:08:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:22,301 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2638 transitions. [2022-03-15 19:08:22,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 19:08:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2638 transitions. [2022-03-15 19:08:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:08:22,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:22,303 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:22,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 19:08:22,514 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,SelfDestructingSolverStorable16 [2022-03-15 19:08:22,514 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1222056047, now seen corresponding path program 6 times [2022-03-15 19:08:22,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:22,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782486254] [2022-03-15 19:08:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:23,196 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 19:08:23,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:23,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782486254] [2022-03-15 19:08:23,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782486254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:08:23,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132133260] [2022-03-15 19:08:23,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:08:23,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:23,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:08:23,198 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 19:08:23,200 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 19:08:23,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 19:08:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:08:23,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 19:08:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:08:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:23,813 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 19:08:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:23,885 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 19:08:24,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:24,055 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 44 treesize of output 32 [2022-03-15 19:08:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:08:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:08:24,300 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~n1~0 c_~q1_back~0) (forall ((~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_882 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_882))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))))))) is different from false [2022-03-15 19:08:24,334 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~n1~0 c_~q1_back~0) (forall ((~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_881 (Array Int Int)) (v_ArrVal_882 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_882))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4))))))))) is different from false [2022-03-15 19:08:24,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:24,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 965 treesize of output 929 [2022-03-15 19:08:24,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:24,390 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 817 treesize of output 661 [2022-03-15 19:08:24,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:24,420 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 592 treesize of output 538 [2022-03-15 19:08:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:08:38,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132133260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:08:38,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:08:38,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 43 [2022-03-15 19:08:38,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1674573409] [2022-03-15 19:08:38,637 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:38,642 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:38,670 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 85 transitions. [2022-03-15 19:08:38,670 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:39,748 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25274#(and (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (not (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1)) (<= ~n1~0 ~q1_back~0) (= ~q2~0.offset 0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (= (+ ~q2_back~0 (* (- 1) ~q2_front~0)) 0) (not (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1)) (<= ~n1~0 ~q1_back~0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (<= ~n1~0 ~q1_front~0) (= ~q1~0.offset 0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (= 2 (select (select |#memory_int| ~q1~0.base) (+ ~q1~0.offset (* ~q1_front~0 4)))) (<= ~n1~0 ~q1_back~0) (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1)))] [2022-03-15 19:08:39,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 19:08:39,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 19:08:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1645, Unknown=2, NotChecked=166, Total=1980 [2022-03-15 19:08:39,750 INFO L87 Difference]: Start difference. First operand 752 states and 2638 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:08:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:44,821 INFO L93 Difference]: Finished difference Result 3467 states and 12404 transitions. [2022-03-15 19:08:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 19:08:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 19:08:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:44,834 INFO L225 Difference]: With dead ends: 3467 [2022-03-15 19:08:44,835 INFO L226 Difference]: Without dead ends: 2923 [2022-03-15 19:08:44,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1184, Invalid=7378, Unknown=2, NotChecked=366, Total=8930 [2022-03-15 19:08:44,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 289 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:44,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 0 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 19:08:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-03-15 19:08:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1164. [2022-03-15 19:08:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 3.7308684436801376) internal successors, (4339), 1163 states have internal predecessors, (4339), 0 states have call successors, (0), 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 19:08:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 4339 transitions. [2022-03-15 19:08:44,879 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 4339 transitions. Word has length 34 [2022-03-15 19:08:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 4339 transitions. [2022-03-15 19:08:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:08:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 4339 transitions. [2022-03-15 19:08:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:08:44,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:44,882 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:44,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 19:08:45,095 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,SelfDestructingSolverStorable17 [2022-03-15 19:08:45,096 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -338083431, now seen corresponding path program 7 times [2022-03-15 19:08:45,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:45,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804837692] [2022-03-15 19:08:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:45,649 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 19:08:45,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:45,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804837692] [2022-03-15 19:08:45,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804837692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:08:45,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981397495] [2022-03-15 19:08:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:08:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:08:45,664 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 19:08:45,666 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 19:08:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 19:08:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:08:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:46,073 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 19:08:46,110 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 19:08:46,166 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 19:08:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:08:46,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:08:46,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:46,254 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 25 treesize of output 25 [2022-03-15 19:08:46,344 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~n1~0 c_~q1_back~0) (and (forall ((v_ArrVal_955 (Array Int Int))) (< 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_955) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (forall ((~q2~0.offset Int)) (= (+ ~q2~0.offset (* c_~q2_back~0 4)) (+ ~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-03-15 19:08:46,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:46,354 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 55 treesize of output 55 [2022-03-15 19:08:46,356 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 34 treesize of output 28 [2022-03-15 19:08:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:08:46,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981397495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:08:46,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:08:46,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 12] total 41 [2022-03-15 19:08:46,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1680032916] [2022-03-15 19:08:46,636 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:46,641 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:46,660 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 19:08:46,660 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:46,940 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:08:46,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:08:46,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:08:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1491, Unknown=1, NotChecked=78, Total=1722 [2022-03-15 19:08:46,942 INFO L87 Difference]: Start difference. First operand 1164 states and 4339 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:08:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:47,842 INFO L93 Difference]: Finished difference Result 1396 states and 4904 transitions. [2022-03-15 19:08:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 19:08:47,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 19:08:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:47,847 INFO L225 Difference]: With dead ends: 1396 [2022-03-15 19:08:47,847 INFO L226 Difference]: Without dead ends: 1348 [2022-03-15 19:08:47,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=305, Invalid=2890, Unknown=1, NotChecked=110, Total=3306 [2022-03-15 19:08:47,849 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:47,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:08:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-03-15 19:08:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1159. [2022-03-15 19:08:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.738341968911917) internal successors, (4329), 1158 states have internal predecessors, (4329), 0 states have call successors, (0), 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 19:08:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 4329 transitions. [2022-03-15 19:08:47,871 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 4329 transitions. Word has length 34 [2022-03-15 19:08:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:47,871 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 4329 transitions. [2022-03-15 19:08:47,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 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 19:08:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 4329 transitions. [2022-03-15 19:08:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:08:47,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:47,873 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:47,909 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 19:08:48,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:48,092 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash 117975821, now seen corresponding path program 8 times [2022-03-15 19:08:48,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:48,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82317113] [2022-03-15 19:08:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:48,906 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 19:08:48,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:48,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82317113] [2022-03-15 19:08:48,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82317113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:08:48,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001198723] [2022-03-15 19:08:48,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:08:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:08:48,907 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 19:08:48,908 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 19:08:49,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:08:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:08:49,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 19:08:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:08:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:49,441 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 19:08:49,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:49,674 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 19:08:49,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2022-03-15 19:08:49,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:49,818 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 44 treesize of output 32 [2022-03-15 19:08:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:08:49,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:08:49,979 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q1_back~0 c_~n1~0)) (forall ((v_ArrVal_1029 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1029) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-03-15 19:08:49,989 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1029 (Array Int Int)) (~q2~0.offset Int)) (or (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1029) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (<= |c_thread2Thread1of1ForFork0_~j~0#1| (+ (select (select |c_#memory_int| c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))))) (not (< c_~q1_back~0 c_~n1~0))) is different from false [2022-03-15 19:08:50,001 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1029 (Array Int Int)) (~q2~0.offset Int)) (or (< (+ (select (select |c_#memory_int| c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1029) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4)))))) (not (< c_~q1_back~0 c_~n1~0))) is different from false [2022-03-15 19:08:50,033 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q1_back~0 c_~n1~0)) (forall ((v_ArrVal_1029 (Array Int Int)) (v_ArrVal_1028 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1028))) (or (< 0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1029) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select (select .cse0 c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse0 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2022-03-15 19:08:50,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:50,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 245 [2022-03-15 19:08:50,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:50,086 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 106 treesize of output 124 [2022-03-15 19:08:50,093 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 54 treesize of output 42 [2022-03-15 19:08:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:08:53,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001198723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:08:53,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:08:53,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 46 [2022-03-15 19:08:53,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1613632660] [2022-03-15 19:08:53,786 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:08:53,792 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:08:53,808 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 56 transitions. [2022-03-15 19:08:53,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:08:54,112 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:08:54,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 19:08:54,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:08:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 19:08:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1654, Unknown=4, NotChecked=340, Total=2162 [2022-03-15 19:08:54,113 INFO L87 Difference]: Start difference. First operand 1159 states and 4329 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:08:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:08:55,348 INFO L93 Difference]: Finished difference Result 1578 states and 5628 transitions. [2022-03-15 19:08:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 19:08:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 19:08:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:08:55,355 INFO L225 Difference]: With dead ends: 1578 [2022-03-15 19:08:55,355 INFO L226 Difference]: Without dead ends: 1530 [2022-03-15 19:08:55,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=291, Invalid=2913, Unknown=4, NotChecked=452, Total=3660 [2022-03-15 19:08:55,356 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:08:55,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:08:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-03-15 19:08:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1152. [2022-03-15 19:08:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.7506516072980016) internal successors, (4317), 1151 states have internal predecessors, (4317), 0 states have call successors, (0), 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 19:08:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4317 transitions. [2022-03-15 19:08:55,419 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4317 transitions. Word has length 34 [2022-03-15 19:08:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:08:55,419 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 4317 transitions. [2022-03-15 19:08:55,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:08:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4317 transitions. [2022-03-15 19:08:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:08:55,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:08:55,421 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:08:55,451 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 19:08:55,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:55,622 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:08:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:08:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2022328498, now seen corresponding path program 9 times [2022-03-15 19:08:55,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:08:55,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627720062] [2022-03-15 19:08:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:08:55,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:08:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:08:56,304 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 19:08:56,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:08:56,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627720062] [2022-03-15 19:08:56,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627720062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:08:56,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247499075] [2022-03-15 19:08:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:08:56,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:08:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:08:56,305 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 19:08:56,306 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 19:08:56,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:08:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:08:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 19:08:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:08:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:56,665 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 19:08:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:08:56,706 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 19:08:56,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:56,852 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 44 treesize of output 32 [2022-03-15 19:08:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 19:08:56,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:08:57,035 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (v_ArrVal_1103 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1103))) (let ((.cse0 (select (select .cse2 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (.cse1 (select .cse2 ~q2~0.base))) (or (<= .cse0 0) (< (+ (select .cse1 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) .cse0) (< 0 (select .cse1 (+ ~q2~0.offset (* c_~q2_front~0 4)))))))) is different from false [2022-03-15 19:08:57,071 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (v_ArrVal_1103 (Array Int Int)) (v_ArrVal_1102 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1102) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1103))) (let ((.cse0 (select (select .cse2 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (.cse1 (select .cse2 ~q2~0.base))) (or (<= .cse0 0) (< (+ (select .cse1 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) .cse0) (< 0 (select .cse1 (+ ~q2~0.offset (* c_~q2_front~0 4)))))))) is different from false [2022-03-15 19:08:57,133 INFO L353 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-03-15 19:08:57,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1110 treesize of output 1046 [2022-03-15 19:08:57,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:57,163 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 919 treesize of output 853 [2022-03-15 19:08:57,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:08:57,188 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 832 treesize of output 652 [2022-03-15 19:09:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:09:00,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247499075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:09:00,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:09:00,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 38 [2022-03-15 19:09:00,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [104781992] [2022-03-15 19:09:00,810 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:00,816 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:00,839 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 85 transitions. [2022-03-15 19:09:00,840 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:02,424 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39548#(and (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (<= ~n1~0 ~q1_front~0) (= ~q2~0.offset 0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (not (= 0 ~q2_front~0)) (<= ~n1~0 ~q1_front~0) (not (= ~q1~0.base |ULTIMATE.start_main_~#t2~0#1.base|)) (not (= (+ (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1) 1))) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (= (+ ~q2_back~0 (* (- 1) ~q2_front~0)) 0) (<= ~n1~0 ~q1_front~0)) (or (<= ~q1_back~0 ~q1_front~0) (<= ~n2~0 2) (< ~q1_front~0 0) (<= ~n1~0 ~q1_front~0) (<= ~q2_front~0 0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (<= ~n1~0 ~q1_front~0) (= ~q1~0.offset 0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (not (= 0 ~q2_front~0)) (= 2 (select (select |#memory_int| ~q1~0.base) (+ ~q1~0.offset (* ~q1_front~0 4)))) (<= ~n1~0 ~q1_back~0) (not (= (+ (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1) 1))))] [2022-03-15 19:09:02,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 19:09:02,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 19:09:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1288, Unknown=2, NotChecked=146, Total=1560 [2022-03-15 19:09:02,425 INFO L87 Difference]: Start difference. First operand 1152 states and 4317 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:03,641 INFO L93 Difference]: Finished difference Result 1574 states and 5572 transitions. [2022-03-15 19:09:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 19:09:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 19:09:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:03,650 INFO L225 Difference]: With dead ends: 1574 [2022-03-15 19:09:03,650 INFO L226 Difference]: Without dead ends: 1526 [2022-03-15 19:09:03,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=255, Invalid=2613, Unknown=2, NotChecked=210, Total=3080 [2022-03-15 19:09:03,651 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:03,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:09:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2022-03-15 19:09:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1200. [2022-03-15 19:09:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.689741451209341) internal successors, (4424), 1199 states have internal predecessors, (4424), 0 states have call successors, (0), 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 19:09:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4424 transitions. [2022-03-15 19:09:03,673 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4424 transitions. Word has length 34 [2022-03-15 19:09:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:03,674 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 4424 transitions. [2022-03-15 19:09:03,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4424 transitions. [2022-03-15 19:09:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:09:03,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:03,677 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:03,700 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 19:09:03,895 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,SelfDestructingSolverStorable20 [2022-03-15 19:09:03,896 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:09:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:09:03,896 INFO L85 PathProgramCache]: Analyzing trace with hash 462189020, now seen corresponding path program 10 times [2022-03-15 19:09:03,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:09:03,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832202347] [2022-03-15 19:09:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:09:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:09:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:04,645 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 19:09:04,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:09:04,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832202347] [2022-03-15 19:09:04,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832202347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:04,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186257244] [2022-03-15 19:09:04,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:09:04,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:04,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:09:04,646 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 19:09:04,647 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 19:09:04,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:09:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:09:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 19:09:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:09:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:05,022 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 19:09:05,053 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 19:09:05,128 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 25 treesize of output 7 [2022-03-15 19:09:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:09:05,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:09:05,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:05,235 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 26 treesize of output 26 [2022-03-15 19:09:05,369 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_1176 (Array Int Int))) (< 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1176) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (= (+ (* c_~q2_back~0 4) c_~q2~0.offset) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (not (<= 0 c_~q2_back~0)) (<= c_~n2~0 (+ c_~q2_back~0 1))) is different from false [2022-03-15 19:09:05,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:05,380 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 55 treesize of output 55 [2022-03-15 19:09:05,382 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 34 treesize of output 28 [2022-03-15 19:09:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:09:05,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186257244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:09:05,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:09:05,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 41 [2022-03-15 19:09:05,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [494900371] [2022-03-15 19:09:05,601 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:05,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:05,690 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 19:09:05,691 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:06,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:09:06,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:09:06,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:09:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1476, Unknown=1, NotChecked=78, Total=1722 [2022-03-15 19:09:06,672 INFO L87 Difference]: Start difference. First operand 1200 states and 4424 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 19:09:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:07,915 INFO L93 Difference]: Finished difference Result 1607 states and 5633 transitions. [2022-03-15 19:09:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 19:09:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 19:09:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:07,929 INFO L225 Difference]: With dead ends: 1607 [2022-03-15 19:09:07,929 INFO L226 Difference]: Without dead ends: 1559 [2022-03-15 19:09:07,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=320, Invalid=2763, Unknown=1, NotChecked=108, Total=3192 [2022-03-15 19:09:07,930 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:07,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:09:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-03-15 19:09:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1201. [2022-03-15 19:09:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.6883333333333335) internal successors, (4426), 1200 states have internal predecessors, (4426), 0 states have call successors, (0), 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 19:09:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4426 transitions. [2022-03-15 19:09:07,953 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4426 transitions. Word has length 34 [2022-03-15 19:09:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:07,953 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 4426 transitions. [2022-03-15 19:09:07,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 19:09:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4426 transitions. [2022-03-15 19:09:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 19:09:07,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:07,956 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:07,975 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 19:09:08,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 19:09:08,173 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:09:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:09:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash 918248272, now seen corresponding path program 11 times [2022-03-15 19:09:08,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:09:08,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748460969] [2022-03-15 19:09:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:09:08,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:09:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:08,794 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 19:09:08,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:09:08,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748460969] [2022-03-15 19:09:08,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748460969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:08,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520030502] [2022-03-15 19:09:08,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:09:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:09:08,796 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 19:09:08,797 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 19:09:08,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 19:09:08,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:09:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 19:09:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:09:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:09,341 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 19:09:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:09,511 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 19:09:09,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2022-03-15 19:09:09,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:09,595 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 46 treesize of output 33 [2022-03-15 19:09:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:09:09,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:09:09,753 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q2_back~0 c_~n2~0)) (forall ((v_ArrVal_1250 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1250) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-03-15 19:09:09,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:09,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 263 treesize of output 315 [2022-03-15 19:09:09,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:09,989 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 203 treesize of output 215 [2022-03-15 19:09:09,995 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 118 treesize of output 94 [2022-03-15 19:09:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:09:10,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520030502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:09:10,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:09:10,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 45 [2022-03-15 19:09:10,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [688311093] [2022-03-15 19:09:10,600 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:10,627 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:10,643 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 56 transitions. [2022-03-15 19:09:10,643 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:10,937 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:09:10,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:09:10,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:09:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1806, Unknown=5, NotChecked=86, Total=2070 [2022-03-15 19:09:10,939 INFO L87 Difference]: Start difference. First operand 1201 states and 4426 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:14,806 INFO L93 Difference]: Finished difference Result 2900 states and 10189 transitions. [2022-03-15 19:09:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 19:09:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 19:09:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:14,813 INFO L225 Difference]: With dead ends: 2900 [2022-03-15 19:09:14,813 INFO L226 Difference]: Without dead ends: 2784 [2022-03-15 19:09:14,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=740, Invalid=5901, Unknown=5, NotChecked=160, Total=6806 [2022-03-15 19:09:14,815 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 367 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:14,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 0 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 19:09:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2022-03-15 19:09:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 1452. [2022-03-15 19:09:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.826326671261199) internal successors, (5552), 1451 states have internal predecessors, (5552), 0 states have call successors, (0), 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 19:09:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 5552 transitions. [2022-03-15 19:09:14,852 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 5552 transitions. Word has length 34 [2022-03-15 19:09:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:14,852 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 5552 transitions. [2022-03-15 19:09:14,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 5552 transitions. [2022-03-15 19:09:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:09:14,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:14,855 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:14,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 19:09:15,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:15,084 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:09:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:09:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1497547721, now seen corresponding path program 12 times [2022-03-15 19:09:15,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:09:15,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024496722] [2022-03-15 19:09:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:09:15,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:09:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:09:15,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:09:15,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024496722] [2022-03-15 19:09:15,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024496722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:15,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238136821] [2022-03-15 19:09:15,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:09:15,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:15,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:09:15,820 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 19:09:15,821 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 19:09:16,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 19:09:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:09:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 19:09:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:09:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:16,294 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 19:09:16,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:16,357 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 19:09:16,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:16,521 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 44 treesize of output 32 [2022-03-15 19:09:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 19:09:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:09:16,764 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q1_back~0 c_~n1~0)) (forall ((v_ArrVal_1328 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1328))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4))))))))) is different from false [2022-03-15 19:09:16,787 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1328))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) (not (< c_~q1_back~0 c_~n1~0))) is different from false [2022-03-15 19:09:16,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:16,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 517 treesize of output 545 [2022-03-15 19:09:16,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:16,842 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 433 treesize of output 373 [2022-03-15 19:09:16,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:16,862 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 304 treesize of output 298 [2022-03-15 19:09:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:09:32,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238136821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:09:32,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:09:32,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 43 [2022-03-15 19:09:32,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [241051813] [2022-03-15 19:09:32,657 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:32,685 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:32,710 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 86 transitions. [2022-03-15 19:09:32,711 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:33,913 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54204#(and (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (<= ~n1~0 ~q1_front~0) (<= ~n2~0 (+ ~q2_back~0 1)) (= ~q2~0.offset 0)) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (= (+ ~q2_back~0 (* (- 1) ~q2_front~0)) 0) (<= ~n1~0 ~q1_front~0) (<= ~n2~0 (+ ~q2_back~0 1))) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (= 2 (select (select |#memory_int| ~q1~0.base) (+ ~q1~0.offset (* ~q1_front~0 4)))) (<= ~n1~0 ~q1_back~0) (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1) (<= ~n2~0 (+ ~q2_back~0 1))) (or (<= ~q1_back~0 ~q1_front~0) (< ~q1_front~0 0) (= ~q1~0.offset 0) (<= ~n1~0 ~q1_back~0) (<= ~n2~0 (+ ~q2_back~0 1))))] [2022-03-15 19:09:33,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 19:09:33,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 19:09:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1646, Unknown=2, NotChecked=166, Total=1980 [2022-03-15 19:09:33,914 INFO L87 Difference]: Start difference. First operand 1452 states and 5552 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:35,829 INFO L93 Difference]: Finished difference Result 2725 states and 9949 transitions. [2022-03-15 19:09:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 19:09:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 19:09:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:35,836 INFO L225 Difference]: With dead ends: 2725 [2022-03-15 19:09:35,837 INFO L226 Difference]: Without dead ends: 2677 [2022-03-15 19:09:35,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 55 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=435, Invalid=4127, Unknown=2, NotChecked=266, Total=4830 [2022-03-15 19:09:35,838 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 248 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:35,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 0 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:09:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2022-03-15 19:09:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 1500. [2022-03-15 19:09:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.7751834556370913) internal successors, (5659), 1499 states have internal predecessors, (5659), 0 states have call successors, (0), 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 19:09:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 5659 transitions. [2022-03-15 19:09:35,871 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 5659 transitions. Word has length 35 [2022-03-15 19:09:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:35,871 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 5659 transitions. [2022-03-15 19:09:35,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 5659 transitions. [2022-03-15 19:09:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:09:35,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:35,874 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:35,897 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 19:09:36,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:36,098 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:09:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:09:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash -62591757, now seen corresponding path program 13 times [2022-03-15 19:09:36,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:09:36,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769230906] [2022-03-15 19:09:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:09:36,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:09:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:09:36,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:09:36,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769230906] [2022-03-15 19:09:36,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769230906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:36,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380657596] [2022-03-15 19:09:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:09:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:09:36,809 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:09:36,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 19:09:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 19:09:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:09:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:37,302 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 19:09:37,363 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 19:09:37,459 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 19:09:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:09:37,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:09:37,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:37,600 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 25 treesize of output 25 [2022-03-15 19:09:37,739 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_1405 (Array Int Int))) (< 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1405) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (forall ((~q2~0.offset Int)) (= (+ ~q2~0.offset (* c_~q2_back~0 4)) (+ ~q2~0.offset (* c_~q2_front~0 4))))) (<= c_~n1~0 c_~q1_back~0)) is different from false [2022-03-15 19:09:37,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:37,750 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 55 treesize of output 55 [2022-03-15 19:09:37,753 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 34 treesize of output 28 [2022-03-15 19:09:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:09:37,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380657596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:09:37,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:09:37,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 12] total 44 [2022-03-15 19:09:37,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [552775765] [2022-03-15 19:09:37,998 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:38,002 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:38,021 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 66 transitions. [2022-03-15 19:09:38,021 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:38,296 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:09:38,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 19:09:38,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 19:09:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1734, Unknown=1, NotChecked=84, Total=1980 [2022-03-15 19:09:38,297 INFO L87 Difference]: Start difference. First operand 1500 states and 5659 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:39,976 INFO L93 Difference]: Finished difference Result 2778 states and 10050 transitions. [2022-03-15 19:09:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 19:09:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 19:09:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:39,988 INFO L225 Difference]: With dead ends: 2778 [2022-03-15 19:09:39,989 INFO L226 Difference]: Without dead ends: 2730 [2022-03-15 19:09:39,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=400, Invalid=4025, Unknown=1, NotChecked=130, Total=4556 [2022-03-15 19:09:39,990 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:39,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:09:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2022-03-15 19:09:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1501. [2022-03-15 19:09:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.774) internal successors, (5661), 1500 states have internal predecessors, (5661), 0 states have call successors, (0), 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 19:09:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 5661 transitions. [2022-03-15 19:09:40,023 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 5661 transitions. Word has length 35 [2022-03-15 19:09:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:40,023 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 5661 transitions. [2022-03-15 19:09:40,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:09:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 5661 transitions. [2022-03-15 19:09:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:09:40,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:40,026 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:40,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 19:09:40,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-15 19:09:40,239 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:09:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:09:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 393467495, now seen corresponding path program 14 times [2022-03-15 19:09:40,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:09:40,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570366142] [2022-03-15 19:09:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:09:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:09:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:09:41,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:09:41,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570366142] [2022-03-15 19:09:41,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570366142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:41,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241792216] [2022-03-15 19:09:41,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:09:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:09:41,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:09:41,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 19:09:41,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:09:41,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:09:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 19:09:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:09:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:41,841 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 19:09:42,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:42,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:42,004 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 19:09:42,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2022-03-15 19:09:42,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:42,084 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 44 treesize of output 32 [2022-03-15 19:09:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:09:42,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:09:42,197 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1483 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1483) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))))) is different from false [2022-03-15 19:09:44,273 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.offset Int) (v_ArrVal_1483 (Array Int Int))) (or (< (+ (select (select |c_#memory_int| c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1483) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-03-15 19:09:44,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.offset Int) (v_ArrVal_1483 (Array Int Int)) (v_ArrVal_1482 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1482))) (or (<= 1 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1483) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select (select .cse0 c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse0 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))))) is different from false [2022-03-15 19:09:44,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:44,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 262 treesize of output 314 [2022-03-15 19:09:44,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:44,348 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 203 treesize of output 215 [2022-03-15 19:09:44,354 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 118 treesize of output 94 [2022-03-15 19:09:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-15 19:09:45,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241792216] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:45,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:09:45,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21, 15] total 44 [2022-03-15 19:09:45,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1092186292] [2022-03-15 19:09:45,329 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:45,333 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:45,350 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 57 transitions. [2022-03-15 19:09:45,350 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:45,431 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:09:45,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:09:45,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:09:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1607, Unknown=4, NotChecked=246, Total=1980 [2022-03-15 19:09:45,432 INFO L87 Difference]: Start difference. First operand 1501 states and 5661 transitions. Second operand has 12 states, 12 states have (on average 2.75) 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 19:09:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:45,645 INFO L93 Difference]: Finished difference Result 1965 states and 7210 transitions. [2022-03-15 19:09:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:09:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) 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 35 [2022-03-15 19:09:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:45,650 INFO L225 Difference]: With dead ends: 1965 [2022-03-15 19:09:45,650 INFO L226 Difference]: Without dead ends: 1965 [2022-03-15 19:09:45,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=139, Invalid=1845, Unknown=8, NotChecked=264, Total=2256 [2022-03-15 19:09:45,651 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:45,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 232 Unchecked, 0.1s Time] [2022-03-15 19:09:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-03-15 19:09:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1519. [2022-03-15 19:09:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.748353096179183) internal successors, (5690), 1518 states have internal predecessors, (5690), 0 states have call successors, (0), 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 19:09:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 5690 transitions. [2022-03-15 19:09:45,675 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 5690 transitions. Word has length 35 [2022-03-15 19:09:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:45,675 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 5690 transitions. [2022-03-15 19:09:45,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) 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 19:09:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 5690 transitions. [2022-03-15 19:09:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:09:45,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:45,678 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:45,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 19:09:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 19:09:45,894 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:09:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:09:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1806316609, now seen corresponding path program 15 times [2022-03-15 19:09:45,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:09:45,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696025032] [2022-03-15 19:09:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:09:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:09:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:09:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:09:46,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:09:46,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696025032] [2022-03-15 19:09:46,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696025032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:09:46,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789195253] [2022-03-15 19:09:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:09:46,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:09:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:09:46,724 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:09:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 19:09:46,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:09:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:09:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 19:09:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:09:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:09:47,392 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:09:47,392 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 35 treesize of output 42 [2022-03-15 19:09:47,399 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 25 treesize of output 17 [2022-03-15 19:09:47,456 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 19:09:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:09:47,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:09:47,651 WARN L838 $PredicateComparison]: unable to prove that (or (not (< c_~q1_back~0 c_~n1~0)) (forall ((v_ArrVal_1560 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1560) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-03-15 19:09:47,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:09:47,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 142 [2022-03-15 19:09:47,879 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 13 treesize of output 7 [2022-03-15 19:09:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-15 19:09:48,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789195253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:09:48,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:09:48,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 44 [2022-03-15 19:09:48,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1916756201] [2022-03-15 19:09:48,403 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:09:48,409 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:09:48,430 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 67 transitions. [2022-03-15 19:09:48,431 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:09:49,746 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71562#(and (or (< 0 (+ ~q1~0.offset (* ~q1_front~0 4) 1)) (<= ~n1~0 ~q1_back~0) (<= (* ~n1~0 4) (+ 7 (* ~q1_back~0 4) ~q1~0.offset)) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (< ~q1_back~0 0)) (or (= (+ ~q2_back~0 (* (- 1) ~q2_front~0)) 0) (not (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1)) (<= ~n1~0 ~q1_back~0) (<= (* ~n1~0 4) (+ 7 (* ~q1_back~0 4) ~q1~0.offset)) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (< ~q1_back~0 0)) (or (= 2 (select (select |#memory_int| ~q1~0.base) (+ ~q1~0.offset (* ~q1_front~0 4)))) (<= ~n1~0 ~q1_back~0) (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1) (<= (* ~n1~0 4) (+ 7 (* ~q1_back~0 4) ~q1~0.offset)) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (< ~q1_back~0 0)) (or (= ~q1~0.offset 0) (<= ~n1~0 ~q1_back~0) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (< ~q1_back~0 0)) (or (<= ~n1~0 ~q1_back~0) (<= (* ~n1~0 4) (+ 7 (* ~q1_back~0 4) ~q1~0.offset)) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (= ~q2~0.offset 0) (< ~q1_back~0 0)) (or (<= ~q2_back~0 2) (not (= (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1)) (<= ~n1~0 ~q1_back~0) (<= ~n2~0 (+ ~q2_back~0 1)) (<= (* ~n1~0 4) (+ 7 (* ~q1_back~0 4) ~q1~0.offset)) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (< ~q1_back~0 0)) (or (<= ~n1~0 ~q1_back~0) (<= (* ~n1~0 4) (+ 7 (* ~q1_back~0 4) ~q1~0.offset)) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (<= (+ ~q1~0.offset (* ~q1_front~0 4)) 0) (< ~q1_back~0 0)) (or (not (= ~q2~0.base |ULTIMATE.start_main_~#t3~0#1.base|)) (<= ~n1~0 ~q1_back~0) (not (= (select (select |#memory_int| ~q1~0.base) (+ (* ~q1_back~0 4) ~q1~0.offset)) 2)) (< ~q1_back~0 0)))] [2022-03-15 19:09:49,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 19:09:49,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:09:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 19:09:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1796, Unknown=4, NotChecked=86, Total=2070 [2022-03-15 19:09:49,747 INFO L87 Difference]: Start difference. First operand 1519 states and 5690 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 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 19:09:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:09:59,828 INFO L93 Difference]: Finished difference Result 5814 states and 20318 transitions. [2022-03-15 19:09:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 19:09:59,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 19:09:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:09:59,861 INFO L225 Difference]: With dead ends: 5814 [2022-03-15 19:09:59,862 INFO L226 Difference]: Without dead ends: 5730 [2022-03-15 19:09:59,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2576, Invalid=12430, Unknown=4, NotChecked=242, Total=15252 [2022-03-15 19:09:59,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 662 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:09:59,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 0 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 19:09:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2022-03-15 19:09:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 1810. [2022-03-15 19:09:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 3.8933112216694306) internal successors, (7043), 1809 states have internal predecessors, (7043), 0 states have call successors, (0), 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 19:09:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 7043 transitions. [2022-03-15 19:09:59,953 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 7043 transitions. Word has length 35 [2022-03-15 19:09:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:09:59,953 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 7043 transitions. [2022-03-15 19:09:59,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 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 19:09:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 7043 transitions. [2022-03-15 19:09:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:09:59,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:09:59,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:09:59,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 19:10:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 19:10:00,174 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:10:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:10:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1477373560, now seen corresponding path program 1 times [2022-03-15 19:10:00,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:10:00,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183840982] [2022-03-15 19:10:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:10:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:10:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:10:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:10:00,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:10:00,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183840982] [2022-03-15 19:10:00,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183840982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:10:00,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122875158] [2022-03-15 19:10:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:10:00,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:10:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:10:00,220 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:10:00,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 19:10:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:10:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:10:00,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:10:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:10:00,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:10:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:10:00,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122875158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:10:00,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:10:00,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-15 19:10:00,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1357146204] [2022-03-15 19:10:00,597 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:10:00,601 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:10:00,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 86 states and 150 transitions. [2022-03-15 19:10:00,635 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:10:00,647 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 13 treesize of output 5 [2022-03-15 19:10:00,704 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:10:00,734 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 13 treesize of output 5 [2022-03-15 19:10:00,918 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 13 treesize of output 5 [2022-03-15 19:10:00,999 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 13 treesize of output 5 [2022-03-15 19:10:01,166 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-15 19:10:01,237 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 13 treesize of output 5 [2022-03-15 19:10:01,358 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [81368#(or (< ~q3_back~0 0) (<= ~n3~0 ~q3_back~0)), 81369#(or (<= ~q3_back~0 0) (<= ~n3~0 ~q3_back~0))] [2022-03-15 19:10:01,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 19:10:01,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:10:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 19:10:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 19:10:01,363 INFO L87 Difference]: Start difference. First operand 1810 states and 7043 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:10:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:10:01,484 INFO L93 Difference]: Finished difference Result 3484 states and 12125 transitions. [2022-03-15 19:10:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 19:10:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 19:10:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:10:01,489 INFO L225 Difference]: With dead ends: 3484 [2022-03-15 19:10:01,489 INFO L226 Difference]: Without dead ends: 2026 [2022-03-15 19:10:01,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-03-15 19:10:01,490 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:10:01,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:10:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-03-15 19:10:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1930. [2022-03-15 19:10:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 3.7662001036806636) internal successors, (7265), 1929 states have internal predecessors, (7265), 0 states have call successors, (0), 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 19:10:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 7265 transitions. [2022-03-15 19:10:01,549 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 7265 transitions. Word has length 35 [2022-03-15 19:10:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:10:01,549 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 7265 transitions. [2022-03-15 19:10:01,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 19:10:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 7265 transitions. [2022-03-15 19:10:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:10:01,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:10:01,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:10:01,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 19:10:01,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:10:01,767 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:10:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:10:01,768 INFO L85 PathProgramCache]: Analyzing trace with hash 536189926, now seen corresponding path program 16 times [2022-03-15 19:10:01,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:10:01,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250213761] [2022-03-15 19:10:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:10:01,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:10:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:10:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:10:02,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:10:02,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250213761] [2022-03-15 19:10:02,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250213761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:10:02,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36134065] [2022-03-15 19:10:02,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:10:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:10:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:10:02,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:10:02,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 19:10:02,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:10:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:10:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 19:10:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:10:02,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:10:02,967 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 19:10:03,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:10:03,010 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 19:10:03,166 INFO L353 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2022-03-15 19:10:03,167 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 44 treesize of output 29 [2022-03-15 19:10:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:10:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:10:03,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_1706 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1706))) (let ((.cse0 (select .cse2 ~q2~0.base)) (.cse1 (select (select .cse2 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (not (<= (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4))) 0)) (<= .cse1 0) (not (= (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) .cse1)))))) is different from false [2022-03-15 19:10:03,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_1706 (Array Int Int)) (v_ArrVal_1705 (Array Int Int))) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1706))) (let ((.cse0 (select (select .cse2 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (.cse1 (select .cse2 ~q2~0.base))) (or (not (= .cse0 (+ (select .cse1 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))) (<= .cse0 0) (not (<= (select .cse1 (+ ~q2~0.offset (* c_~q2_front~0 4))) 0)))))) is different from false [2022-03-15 19:10:03,693 INFO L353 Elim1Store]: treesize reduction 16, result has 85.3 percent of original size [2022-03-15 19:10:03,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1152 treesize of output 1084 [2022-03-15 19:10:03,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:10:03,749 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 961 treesize of output 895 [2022-03-15 19:10:03,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:10:03,793 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 874 treesize of output 694 [2022-03-15 19:10:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:10:11,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36134065] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:10:11,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:10:11,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20, 11] total 39 [2022-03-15 19:10:11,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1247099809] [2022-03-15 19:10:11,268 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:10:11,272 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:10:11,296 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 86 transitions. [2022-03-15 19:10:11,296 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:10:11,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [88966#(or (<= |thread2Thread1of1ForFork0_~j~0#1| 0) (< 0 (select (select |#memory_int| ~q2~0.base) (+ (* 4 ~q2_front~0) ~q2~0.offset))) (not (= |thread2Thread1of1ForFork0_~j~0#1| (+ (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1))) (< ~q2_back~0 0))] [2022-03-15 19:10:11,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:10:11,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:10:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:10:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1362, Unknown=2, NotChecked=150, Total=1640 [2022-03-15 19:10:11,671 INFO L87 Difference]: Start difference. First operand 1930 states and 7265 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 19:10:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:10:11,857 INFO L93 Difference]: Finished difference Result 2648 states and 9530 transitions. [2022-03-15 19:10:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 19:10:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 35 [2022-03-15 19:10:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:10:11,862 INFO L225 Difference]: With dead ends: 2648 [2022-03-15 19:10:11,862 INFO L226 Difference]: Without dead ends: 2618 [2022-03-15 19:10:11,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=1582, Unknown=9, NotChecked=162, Total=1892 [2022-03-15 19:10:11,867 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:10:11,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 278 Invalid, 0 Unknown, 275 Unchecked, 0.1s Time] [2022-03-15 19:10:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2022-03-15 19:10:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1948. [2022-03-15 19:10:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.7498715973292245) internal successors, (7301), 1947 states have internal predecessors, (7301), 0 states have call successors, (0), 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 19:10:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 7301 transitions. [2022-03-15 19:10:11,901 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 7301 transitions. Word has length 35 [2022-03-15 19:10:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:10:11,902 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 7301 transitions. [2022-03-15 19:10:11,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 19:10:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 7301 transitions. [2022-03-15 19:10:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:10:11,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:10:11,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:10:11,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 19:10:12,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 19:10:12,131 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:10:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:10:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 257559014, now seen corresponding path program 17 times [2022-03-15 19:10:12,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:10:12,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293294468] [2022-03-15 19:10:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:10:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:10:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:10:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:10:13,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:10:13,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293294468] [2022-03-15 19:10:13,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293294468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:10:13,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959413674] [2022-03-15 19:10:13,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:10:13,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:10:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:10:13,082 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:10:13,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 19:10:13,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 19:10:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:10:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 19:10:13,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:10:13,348 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 34 treesize of output 32 [2022-03-15 19:10:13,542 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 18 treesize of output 20 [2022-03-15 19:10:13,613 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 19:10:14,705 INFO L353 Elim1Store]: treesize reduction 33, result has 42.1 percent of original size [2022-03-15 19:10:14,706 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 44 treesize of output 35 [2022-03-15 19:10:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:10:14,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:10:15,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:10:15,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 965 treesize of output 929 [2022-03-15 19:10:15,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:10:15,226 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 817 treesize of output 661 [2022-03-15 19:10:15,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:10:15,251 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 592 treesize of output 538 [2022-03-15 19:12:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:12:21,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959413674] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:12:21,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:12:21,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20, 11] total 36 [2022-03-15 19:12:21,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821875890] [2022-03-15 19:12:21,400 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:12:21,404 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:12:21,460 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 86 transitions. [2022-03-15 19:12:21,460 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:12:21,716 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [95758#(or (<= |thread2Thread1of1ForFork0_~j~0#1| 0) (<= 1 (select (select |#memory_int| ~q2~0.base) (+ (* 4 ~q2_front~0) ~q2~0.offset))) (not (= |thread2Thread1of1ForFork0_~j~0#1| (+ (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1))) (< ~q2_back~0 0))] [2022-03-15 19:12:21,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:12:21,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:12:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:12:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1274, Unknown=4, NotChecked=0, Total=1406 [2022-03-15 19:12:21,717 INFO L87 Difference]: Start difference. First operand 1948 states and 7301 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 19:12:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:12:22,012 INFO L93 Difference]: Finished difference Result 2694 states and 9600 transitions. [2022-03-15 19:12:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 19:12:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 35 [2022-03-15 19:12:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:12:22,017 INFO L225 Difference]: With dead ends: 2694 [2022-03-15 19:12:22,017 INFO L226 Difference]: Without dead ends: 2666 [2022-03-15 19:12:22,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=151, Invalid=1563, Unknown=8, NotChecked=0, Total=1722 [2022-03-15 19:12:22,018 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:12:22,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 233 Unchecked, 0.1s Time] [2022-03-15 19:12:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2022-03-15 19:12:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1984. [2022-03-15 19:12:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.718103883005547) internal successors, (7373), 1983 states have internal predecessors, (7373), 0 states have call successors, (0), 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 19:12:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7373 transitions. [2022-03-15 19:12:22,051 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7373 transitions. Word has length 35 [2022-03-15 19:12:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:12:22,051 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 7373 transitions. [2022-03-15 19:12:22,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 19:12:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7373 transitions. [2022-03-15 19:12:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:12:22,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:12:22,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:12:22,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 19:12:22,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:12:22,273 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:12:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:12:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1023949552, now seen corresponding path program 18 times [2022-03-15 19:12:22,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:12:22,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761453815] [2022-03-15 19:12:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:12:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:12:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:12:23,033 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 19:12:23,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:12:23,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761453815] [2022-03-15 19:12:23,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761453815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:12:23,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178386874] [2022-03-15 19:12:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:12:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:12:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:12:23,035 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:12:23,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 19:12:23,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 19:12:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:12:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 19:12:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:12:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:12:23,461 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 19:12:23,493 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 19:12:23,562 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 19:12:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:12:23,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:12:23,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:23,640 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 26 treesize of output 26 [2022-03-15 19:12:23,709 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1864 (Array Int Int))) (<= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1864) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (= c_~q2_front~0 c_~q2_back~0)) is different from false [2022-03-15 19:12:23,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:23,716 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 47 treesize of output 47 [2022-03-15 19:12:23,719 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 26 treesize of output 20 [2022-03-15 19:12:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:12:23,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178386874] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:12:23,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:12:23,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20, 11] total 34 [2022-03-15 19:12:23,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [474768043] [2022-03-15 19:12:23,837 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:12:23,841 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:12:23,860 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 66 transitions. [2022-03-15 19:12:23,860 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:12:23,972 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:12:23,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 19:12:23,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:12:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 19:12:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1020, Unknown=1, NotChecked=64, Total=1190 [2022-03-15 19:12:23,974 INFO L87 Difference]: Start difference. First operand 1984 states and 7373 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:12:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:12:24,212 INFO L93 Difference]: Finished difference Result 2230 states and 7811 transitions. [2022-03-15 19:12:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:12:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 19:12:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:12:24,216 INFO L225 Difference]: With dead ends: 2230 [2022-03-15 19:12:24,216 INFO L226 Difference]: Without dead ends: 2170 [2022-03-15 19:12:24,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1148, Unknown=1, NotChecked=68, Total=1332 [2022-03-15 19:12:24,217 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:12:24,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 346 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-03-15 19:12:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2022-03-15 19:12:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1982. [2022-03-15 19:12:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.717819283190308) internal successors, (7365), 1981 states have internal predecessors, (7365), 0 states have call successors, (0), 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 19:12:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 7365 transitions. [2022-03-15 19:12:24,243 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 7365 transitions. Word has length 35 [2022-03-15 19:12:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:12:24,244 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 7365 transitions. [2022-03-15 19:12:24,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:12:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 7365 transitions. [2022-03-15 19:12:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:12:24,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:12:24,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:12:24,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 19:12:24,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:12:24,463 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:12:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:12:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash -468028166, now seen corresponding path program 19 times [2022-03-15 19:12:24,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:12:24,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128705085] [2022-03-15 19:12:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:12:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:12:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:12:25,374 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 19:12:25,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:12:25,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128705085] [2022-03-15 19:12:25,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128705085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:12:25,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084721449] [2022-03-15 19:12:25,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:12:25,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:12:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:12:25,375 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:12:25,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 19:12:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:12:25,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 19:12:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:12:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:12:25,763 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 19:12:25,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:12:25,793 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 19:12:25,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:25,899 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 44 treesize of output 32 [2022-03-15 19:12:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:12:25,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:12:27,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1942 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1942))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (<= 1 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2022-03-15 19:12:27,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1942 (Array Int Int)) (v_ArrVal_1941 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1941) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1942))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (<= 1 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2022-03-15 19:12:27,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:27,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 516 treesize of output 544 [2022-03-15 19:12:27,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:27,450 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 433 treesize of output 373 [2022-03-15 19:12:27,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:27,477 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 304 treesize of output 298 [2022-03-15 19:12:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:12:39,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084721449] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:12:39,507 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:12:39,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18, 14] total 39 [2022-03-15 19:12:39,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1601860144] [2022-03-15 19:12:39,508 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:12:39,512 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:12:39,535 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 86 transitions. [2022-03-15 19:12:39,535 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:12:39,807 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109111#(or (<= |thread2Thread1of1ForFork0_~j~0#1| 0) (<= 1 (select (select |#memory_int| ~q2~0.base) (+ (* 4 ~q2_front~0) ~q2~0.offset))) (not (= |thread2Thread1of1ForFork0_~j~0#1| (+ (select (select |#memory_int| ~q2~0.base) (+ ~q2~0.offset (* ~q2_back~0 4))) 1))) (< ~q2_back~0 0))] [2022-03-15 19:12:39,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:12:39,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:12:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:12:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1357, Unknown=3, NotChecked=150, Total=1640 [2022-03-15 19:12:39,807 INFO L87 Difference]: Start difference. First operand 1982 states and 7365 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 19:12:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:12:40,049 INFO L93 Difference]: Finished difference Result 2206 states and 7776 transitions. [2022-03-15 19:12:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 19:12:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 35 [2022-03-15 19:12:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:12:40,053 INFO L225 Difference]: With dead ends: 2206 [2022-03-15 19:12:40,053 INFO L226 Difference]: Without dead ends: 2192 [2022-03-15 19:12:40,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=1568, Unknown=19, NotChecked=162, Total=1892 [2022-03-15 19:12:40,053 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:12:40,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 244 Unchecked, 0.1s Time] [2022-03-15 19:12:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-03-15 19:12:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1978. [2022-03-15 19:12:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 3.720283257460799) internal successors, (7355), 1977 states have internal predecessors, (7355), 0 states have call successors, (0), 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 19:12:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 7355 transitions. [2022-03-15 19:12:40,081 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 7355 transitions. Word has length 35 [2022-03-15 19:12:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:12:40,081 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 7355 transitions. [2022-03-15 19:12:40,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 19:12:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 7355 transitions. [2022-03-15 19:12:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:12:40,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:12:40,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:12:40,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 19:12:40,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:12:40,302 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:12:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:12:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 927913960, now seen corresponding path program 20 times [2022-03-15 19:12:40,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:12:40,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499006057] [2022-03-15 19:12:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:12:40,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:12:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:12:41,075 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 19:12:41,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:12:41,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499006057] [2022-03-15 19:12:41,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499006057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:12:41,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292272526] [2022-03-15 19:12:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:12:41,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:12:41,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:12:41,077 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:12:41,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 19:12:41,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:12:41,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:12:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 19:12:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:12:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:12:41,558 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 19:12:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:12:41,599 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 19:12:41,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:41,849 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 46 treesize of output 33 [2022-03-15 19:12:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:12:41,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:12:44,723 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_2020 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2020))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (<= 1 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2022-03-15 19:12:44,738 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2019 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int) (v_ArrVal_2020 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2019) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2020))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (<= 1 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))))))) is different from false [2022-03-15 19:12:44,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:44,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1043 treesize of output 999 [2022-03-15 19:12:44,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:44,798 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 887 treesize of output 719 [2022-03-15 19:12:44,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:12:44,824 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 671 treesize of output 611 [2022-03-15 19:13:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:13:39,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292272526] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:13:39,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:13:39,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19, 14] total 40 [2022-03-15 19:13:39,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [65696466] [2022-03-15 19:13:39,868 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:13:39,872 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:13:39,897 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 86 transitions. [2022-03-15 19:13:39,897 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:13:40,191 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:13:40,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:13:40,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:13:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:13:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1354, Unknown=3, NotChecked=150, Total=1640 [2022-03-15 19:13:40,192 INFO L87 Difference]: Start difference. First operand 1978 states and 7355 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 19:13:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:13:40,364 INFO L93 Difference]: Finished difference Result 2152 states and 7665 transitions. [2022-03-15 19:13:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 19:13:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 35 [2022-03-15 19:13:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:13:40,368 INFO L225 Difference]: With dead ends: 2152 [2022-03-15 19:13:40,368 INFO L226 Difference]: Without dead ends: 2136 [2022-03-15 19:13:40,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=142, Invalid=1489, Unknown=17, NotChecked=158, Total=1806 [2022-03-15 19:13:40,372 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:13:40,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 184 Unchecked, 0.1s Time] [2022-03-15 19:13:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2022-03-15 19:13:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1960. [2022-03-15 19:13:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 3.736089841755998) internal successors, (7319), 1959 states have internal predecessors, (7319), 0 states have call successors, (0), 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 19:13:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 7319 transitions. [2022-03-15 19:13:40,399 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 7319 transitions. Word has length 35 [2022-03-15 19:13:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:13:40,399 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 7319 transitions. [2022-03-15 19:13:40,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 19:13:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 7319 transitions. [2022-03-15 19:13:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:13:40,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:13:40,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:13:40,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 19:13:40,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:13:40,604 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:13:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:13:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1575412394, now seen corresponding path program 21 times [2022-03-15 19:13:40,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:13:40,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698200809] [2022-03-15 19:13:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:13:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:13:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:13:41,499 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 19:13:41,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:13:41,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698200809] [2022-03-15 19:13:41,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698200809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:13:41,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665194103] [2022-03-15 19:13:41,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:13:41,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:13:41,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:13:41,500 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:13:41,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 19:13:41,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:13:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:13:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:13:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:13:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:13:41,888 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 19:13:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:13:41,921 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 19:13:42,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:13:42,036 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 44 treesize of output 32 [2022-03-15 19:13:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:13:42,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 19:13:42,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665194103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:13:42,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 19:13:42,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 28 [2022-03-15 19:13:42,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [254135722] [2022-03-15 19:13:42,067 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:13:42,072 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:13:42,096 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 86 transitions. [2022-03-15 19:13:42,096 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:13:42,341 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:13:42,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:13:42,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:13:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:13:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-03-15 19:13:42,341 INFO L87 Difference]: Start difference. First operand 1960 states and 7319 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 19:13:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:13:42,496 INFO L93 Difference]: Finished difference Result 2486 states and 9109 transitions. [2022-03-15 19:13:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:13:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 35 [2022-03-15 19:13:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:13:42,504 INFO L225 Difference]: With dead ends: 2486 [2022-03-15 19:13:42,504 INFO L226 Difference]: Without dead ends: 2402 [2022-03-15 19:13:42,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-03-15 19:13:42,505 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:13:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 199 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-03-15 19:13:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-03-15 19:13:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1852. [2022-03-15 19:13:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.8352242031334414) internal successors, (7099), 1851 states have internal predecessors, (7099), 0 states have call successors, (0), 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 19:13:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 7099 transitions. [2022-03-15 19:13:42,578 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 7099 transitions. Word has length 35 [2022-03-15 19:13:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:13:42,578 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 7099 transitions. [2022-03-15 19:13:42,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 19:13:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 7099 transitions. [2022-03-15 19:13:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:13:42,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:13:42,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:13:42,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 19:13:42,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-15 19:13:42,782 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:13:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:13:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1527292892, now seen corresponding path program 22 times [2022-03-15 19:13:42,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:13:42,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532622078] [2022-03-15 19:13:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:13:42,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:13:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:13:43,353 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 19:13:43,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:13:43,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532622078] [2022-03-15 19:13:43,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532622078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:13:43,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307982323] [2022-03-15 19:13:43,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:13:43,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:13:43,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:13:43,354 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:13:43,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 19:13:43,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:13:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:13:43,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 19:13:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:13:43,630 INFO L353 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2022-03-15 19:13:43,630 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 3 case distinctions, treesize of input 15 treesize of output 38 [2022-03-15 19:13:43,711 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 19:13:43,712 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 19:13:43,985 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-03-15 19:13:43,985 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 39 treesize of output 46 [2022-03-15 19:13:43,991 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 17 [2022-03-15 19:13:44,024 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 19:13:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 19:13:44,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:13:44,100 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2179 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2179) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))))) is different from false [2022-03-15 19:13:44,163 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2179 (Array Int Int)) (~q2~0.offset Int)) (or (< (+ (select (select |c_#memory_int| c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2179) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-03-15 19:13:44,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:13:44,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 138 [2022-03-15 19:13:44,207 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 13 treesize of output 7 [2022-03-15 19:13:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-15 19:13:44,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307982323] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:13:44,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:13:44,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19, 13] total 35 [2022-03-15 19:13:44,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1617244791] [2022-03-15 19:13:44,505 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:13:44,509 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:13:44,528 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 67 transitions. [2022-03-15 19:13:44,528 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:13:44,641 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:13:44,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:13:44,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:13:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:13:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1018, Unknown=2, NotChecked=130, Total=1260 [2022-03-15 19:13:44,642 INFO L87 Difference]: Start difference. First operand 1852 states and 7099 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 19:13:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:13:46,798 INFO L93 Difference]: Finished difference Result 2068 states and 7481 transitions. [2022-03-15 19:13:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:13:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 35 [2022-03-15 19:13:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:13:46,801 INFO L225 Difference]: With dead ends: 2068 [2022-03-15 19:13:46,801 INFO L226 Difference]: Without dead ends: 2026 [2022-03-15 19:13:46,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=128, Invalid=1210, Unknown=2, NotChecked=142, Total=1482 [2022-03-15 19:13:46,802 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:13:46,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 237 Invalid, 0 Unknown, 264 Unchecked, 0.1s Time] [2022-03-15 19:13:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-03-15 19:13:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1786. [2022-03-15 19:13:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.9210084033613444) internal successors, (6999), 1785 states have internal predecessors, (6999), 0 states have call successors, (0), 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 19:13:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6999 transitions. [2022-03-15 19:13:46,827 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6999 transitions. Word has length 35 [2022-03-15 19:13:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:13:46,827 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 6999 transitions. [2022-03-15 19:13:46,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 19:13:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6999 transitions. [2022-03-15 19:13:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 19:13:46,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:13:46,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:13:46,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 19:13:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 19:13:47,047 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:13:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:13:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash 492995368, now seen corresponding path program 2 times [2022-03-15 19:13:47,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:13:47,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409211471] [2022-03-15 19:13:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:13:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:13:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:13:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 19:13:47,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:13:47,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409211471] [2022-03-15 19:13:47,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409211471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:13:47,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275486232] [2022-03-15 19:13:47,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:13:47,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:13:47,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:13:47,094 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:13:47,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 19:13:47,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:13:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:13:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 19:13:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:13:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:13:47,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:13:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 19:13:47,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275486232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:13:47,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:13:47,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 20 [2022-03-15 19:13:47,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973976964] [2022-03-15 19:13:47,539 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:13:47,543 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:13:47,614 INFO L252 McrAutomatonBuilder]: Finished intersection with 87 states and 151 transitions. [2022-03-15 19:13:47,614 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:13:47,659 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 13 treesize of output 5 [2022-03-15 19:13:47,770 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 13 treesize of output 5 [2022-03-15 19:13:47,821 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 13 treesize of output 5 [2022-03-15 19:13:48,125 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [134042#(or (< ~q2_front~0 0) (<= ~q2_back~0 ~q2_front~0))] [2022-03-15 19:13:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:13:48,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:13:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:13:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:13:48,126 INFO L87 Difference]: Start difference. First operand 1786 states and 6999 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:13:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:13:48,182 INFO L93 Difference]: Finished difference Result 3706 states and 14901 transitions. [2022-03-15 19:13:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 19:13:48,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 19:13:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:13:48,190 INFO L225 Difference]: With dead ends: 3706 [2022-03-15 19:13:48,190 INFO L226 Difference]: Without dead ends: 3696 [2022-03-15 19:13:48,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:13:48,191 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:13:48,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:13:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2022-03-15 19:13:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3432. [2022-03-15 19:13:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 4.124162051879918) internal successors, (14150), 3431 states have internal predecessors, (14150), 0 states have call successors, (0), 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 19:13:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 14150 transitions. [2022-03-15 19:13:48,247 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 14150 transitions. Word has length 36 [2022-03-15 19:13:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:13:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 3432 states and 14150 transitions. [2022-03-15 19:13:48,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:13:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 14150 transitions. [2022-03-15 19:13:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 19:13:48,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:13:48,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:13:48,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 19:13:48,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 19:13:48,459 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:13:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:13:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash -706466904, now seen corresponding path program 3 times [2022-03-15 19:13:48,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:13:48,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322452700] [2022-03-15 19:13:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:13:48,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:13:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:13:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:13:49,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:13:49,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322452700] [2022-03-15 19:13:49,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322452700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:13:49,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565227947] [2022-03-15 19:13:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:13:49,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:13:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:13:49,786 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:13:49,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 19:13:50,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:13:50,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:13:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 19:13:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:13:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:13:50,270 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 19:13:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 19:13:50,315 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 19:13:50,537 INFO L353 Elim1Store]: treesize reduction 11, result has 83.1 percent of original size [2022-03-15 19:13:50,537 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 70 [2022-03-15 19:13:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 19:13:50,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:13:51,784 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q3~0.offset Int) (v_ArrVal_2325 (Array Int Int)) (~q2~0.base Int) (~q3~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2325))) (let ((.cse0 (select .cse1 ~q2~0.base)) (.cse2 (select .cse1 ~q3~0.base))) (or (not (= (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (not (= (+ (select .cse2 (+ ~q3~0.offset (* c_~q3_back~0 4))) 1) (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (let ((.cse3 (select .cse2 (+ ~q3~0.offset (* c_~q3_front~0 4))))) (and (<= (+ .cse3 c_~r~0) 0) (< 0 (+ .cse3 c_~r~0 1)))))))) is different from false [2022-03-15 19:13:51,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((~q3~0.offset Int) (v_ArrVal_2325 (Array Int Int)) (~q2~0.base Int) (~q3~0.base Int) (v_ArrVal_2324 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2324) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2325))) (let ((.cse1 (select .cse3 ~q3~0.base)) (.cse2 (select .cse3 ~q2~0.base))) (or (let ((.cse0 (select .cse1 (+ ~q3~0.offset (* c_~q3_front~0 4))))) (and (<= (+ .cse0 c_~r~0) 0) (< 0 (+ .cse0 c_~r~0 1)))) (not (= (select .cse2 (+ ~q2~0.offset (* c_~q2_front~0 4))) (+ (select .cse1 (+ ~q3~0.offset (* c_~q3_back~0 4))) 1))) (not (= (+ (select .cse2 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse3 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))))))) is different from false [2022-03-15 19:13:52,117 INFO L353 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-03-15 19:13:52,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4038 treesize of output 3742 [2022-03-15 19:13:52,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:13:52,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3482 treesize of output 2826 [2022-03-15 19:13:52,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 19:13:52,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2666 treesize of output 2418 Received shutdown request... [2022-03-15 19:21:41,424 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 19:21:41,425 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-03-15 19:21:41,441 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 19:21:41,441 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 19:21:41,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 19:21:41,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:21:41,640 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 39ms.. [2022-03-15 19:21:41,641 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 19:21:41,641 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 19:21:41,641 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 19:21:41,642 INFO L732 BasicCegarLoop]: Path program histogram: [22, 6, 3, 2, 1, 1, 1, 1] [2022-03-15 19:21:41,644 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 19:21:41,644 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 19:21:41,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 07:21:41 BasicIcfg [2022-03-15 19:21:41,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 19:21:41,645 INFO L158 Benchmark]: Toolchain (without parser) took 850375.25ms. Allocated memory was 176.2MB in the beginning and 979.4MB in the end (delta: 803.2MB). Free memory was 118.4MB in the beginning and 412.7MB in the end (delta: -294.3MB). Peak memory consumption was 668.0MB. Max. memory is 8.0GB. [2022-03-15 19:21:41,645 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 135.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 19:21:41,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.43ms. Allocated memory was 176.2MB in the beginning and 221.2MB in the end (delta: 45.1MB). Free memory was 118.3MB in the beginning and 191.8MB in the end (delta: -73.5MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. [2022-03-15 19:21:41,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.42ms. Allocated memory is still 221.2MB. Free memory was 191.8MB in the beginning and 189.2MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 19:21:41,645 INFO L158 Benchmark]: Boogie Preprocessor took 38.08ms. Allocated memory is still 221.2MB. Free memory was 189.2MB in the beginning and 187.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 19:21:41,645 INFO L158 Benchmark]: RCFGBuilder took 700.36ms. Allocated memory is still 221.2MB. Free memory was 187.1MB in the beginning and 150.4MB in the end (delta: 36.7MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2022-03-15 19:21:41,646 INFO L158 Benchmark]: TraceAbstraction took 849315.36ms. Allocated memory was 221.2MB in the beginning and 979.4MB in the end (delta: 758.1MB). Free memory was 149.9MB in the beginning and 412.7MB in the end (delta: -262.8MB). Peak memory consumption was 653.3MB. Max. memory is 8.0GB. [2022-03-15 19:21:41,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 135.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 274.43ms. Allocated memory was 176.2MB in the beginning and 221.2MB in the end (delta: 45.1MB). Free memory was 118.3MB in the beginning and 191.8MB in the end (delta: -73.5MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.42ms. Allocated memory is still 221.2MB. Free memory was 191.8MB in the beginning and 189.2MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.08ms. Allocated memory is still 221.2MB. Free memory was 189.2MB in the beginning and 187.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 700.36ms. Allocated memory is still 221.2MB. Free memory was 187.1MB in the beginning and 150.4MB in the end (delta: 36.7MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. * TraceAbstraction took 849315.36ms. Allocated memory was 221.2MB in the beginning and 979.4MB in the end (delta: 758.1MB). Free memory was 149.9MB in the beginning and 412.7MB in the end (delta: -262.8MB). Peak memory consumption was 653.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.5s, 255 PlacesBefore, 39 PlacesAfterwards, 267 TransitionsBefore, 37 TransitionsAfterwards, 1962 CoEnabledTransitionPairs, 8 FixpointIterations, 188 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 32 TrivialYvCompositions, 12 ConcurrentYvCompositions, 14 ChoiceCompositions, 278 TotalNumberOfCompositions, 3585 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2605, positive: 2481, positive conditional: 0, positive unconditional: 2481, negative: 124, negative conditional: 0, negative unconditional: 124, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1102, positive: 1077, positive conditional: 0, positive unconditional: 1077, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2605, positive: 1404, positive conditional: 0, positive unconditional: 1404, negative: 99, negative conditional: 0, negative unconditional: 99, unknown: 1102, unknown conditional: 0, unknown unconditional: 1102] , Statistics on independence cache: Total cache size (in pairs): 112, Positive cache size: 103, Positive conditional cache size: 0, Positive unconditional cache size: 103, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 39ms.. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 39ms.. - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 39ms.. - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 39ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 283 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 849.2s, OverallIterations: 37, TraceHistogramMax: 4, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.1s, AutomataDifference: 39.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.6s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3765 SdHoareTripleChecker+Valid, 9.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3765 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1804 IncrementalHoareTripleChecker+Unchecked, 5881 mSDsCounter, 1568 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16302 IncrementalHoareTripleChecker+Invalid, 19674 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1568 mSolverCounterUnsat, 0 mSDtfsCounter, 16302 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3538 GetRequests, 2058 SyntacticMatches, 172 SemanticMatches, 1308 ConstructedPredicates, 31 IntricatePredicates, 0 DeprecatedPredicates, 17685 ImplicationChecksByTransitivity, 55.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3432occurred in iteration=36, InterpolantAutomatonStates: 539, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 36 MinimizatonAttempts, 15904 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 295.5s InterpolantComputationTime, 2072 NumberOfCodeBlocks, 2067 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 2829 ConstructedInterpolants, 207 QuantifiedInterpolants, 48894 SizeOfPredicates, 385 NumberOfNonLiveVariables, 12408 ConjunctsInSsa, 798 ConjunctsInUnsatCore, 88 InterpolantComputations, 19 PerfectInterpolantSequences, 562/1073 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown