/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:24:40,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:24:40,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:24:40,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:24:40,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:24:40,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:24:40,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:24:40,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:24:40,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:24:40,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:24:40,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:24:40,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:24:40,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:24:40,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:24:40,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:24:40,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:24:40,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:24:40,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:24:40,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:24:40,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:24:40,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:24:40,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:24:40,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:24:40,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:24:40,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:24:40,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:24:40,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:24:40,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:24:40,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:24:40,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:24:40,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:24:40,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:24:40,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:24:40,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:24:40,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:24:40,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:24:40,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:24:40,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:24:40,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:24:40,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:24:40,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:24:40,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:24:40,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:24:40,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:24:40,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:24:40,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:24:40,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:24:40,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:24:40,931 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:24:40,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:24:40,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:24:40,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:24:40,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:24:40,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:24:40,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:24:40,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:24:40,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:24:40,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:24:40,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:24:40,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:24:40,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:24:40,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:24:40,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:24:40,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:24:40,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:24:40,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:24:40,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:24:40,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:24:40,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:24:40,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:24:40,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:24:40,936 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:24:40,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:24:40,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:24:41,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:24:41,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:24:41,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:24:41,265 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:24:41,266 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:24:41,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2021-07-09 18:24:41,267 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2021-07-09 18:24:41,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:24:41,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:24:41,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:24:41,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:24:41,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:24:41,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:24:41,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:24:41,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:24:41,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:24:41,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... [2021-07-09 18:24:41,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:24:41,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:24:41,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:24:41,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:24:41,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:24:41,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:24:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:24:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:24:41,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:24:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:24:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:24:41,425 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:24:41,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:24:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:24:41,426 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:24:41,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:24:41,653 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:24:41,655 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:24:41 BoogieIcfgContainer [2021-07-09 18:24:41,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:24:41,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:24:41,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:24:41,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:24:41,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:24:41" (1/2) ... [2021-07-09 18:24:41,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7036339c and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:24:41, skipping insertion in model container [2021-07-09 18:24:41,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:24:41" (2/2) ... [2021-07-09 18:24:41,661 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2021-07-09 18:24:41,682 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:24:41,682 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:24:41,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:24:41,683 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:24:41,735 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:24:41,753 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:24:41,769 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:24:41,769 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:24:41,769 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:24:41,769 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:24:41,769 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:24:41,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:24:41,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:24:41,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:24:41,777 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-07-09 18:24:41,792 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:24:41,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:41,800 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:41,801 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-07-09 18:24:41,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:41,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776637394] [2021-07-09 18:24:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:41,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:41,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776637394] [2021-07-09 18:24:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776637394] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:24:41,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:24:41,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:24:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320136173] [2021-07-09 18:24:41,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:24:41,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:41,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:24:41,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:24:41,992 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:42,026 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-07-09 18:24:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:24:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 18:24:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:42,038 INFO L225 Difference]: With dead ends: 104 [2021-07-09 18:24:42,039 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 18:24:42,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:24:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 18:24:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-07-09 18:24:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-07-09 18:24:42,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-07-09 18:24:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:42,088 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-07-09 18:24:42,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-07-09 18:24:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:24:42,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:42,090 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:42,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:24:42,090 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-07-09 18:24:42,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:42,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691234806] [2021-07-09 18:24:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:42,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691234806] [2021-07-09 18:24:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691234806] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:24:42,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:24:42,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:24:42,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438360630] [2021-07-09 18:24:42,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:24:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:24:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:24:42,157 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:42,181 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-07-09 18:24:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:24:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-07-09 18:24:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:42,183 INFO L225 Difference]: With dead ends: 91 [2021-07-09 18:24:42,183 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 18:24:42,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:24:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 18:24:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-07-09 18:24:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-07-09 18:24:42,191 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-07-09 18:24:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:42,192 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-07-09 18:24:42,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-07-09 18:24:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:24:42,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:42,193 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:42,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:24:42,193 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-07-09 18:24:42,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:42,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036532155] [2021-07-09 18:24:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:42,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036532155] [2021-07-09 18:24:42,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036532155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165633849] [2021-07-09 18:24:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:24:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:42,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:24:42,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:42,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:42,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-09 18:24:42,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:24:42,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:42,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:42,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-07-09 18:24:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:42,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165633849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:42,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:42,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:24:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743313992] [2021-07-09 18:24:42,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:24:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:24:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:24:42,684 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:42,761 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-07-09 18:24:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:24:42,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:24:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:42,762 INFO L225 Difference]: With dead ends: 154 [2021-07-09 18:24:42,762 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 18:24:42,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:24:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 18:24:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-07-09 18:24:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-07-09 18:24:42,776 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-07-09 18:24:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:42,776 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-07-09 18:24:42,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-07-09 18:24:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:42,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:42,778 INFO L508 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] [2021-07-09 18:24:42,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:24:42,979 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-07-09 18:24:42,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:42,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347823378] [2021-07-09 18:24:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:43,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:43,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347823378] [2021-07-09 18:24:43,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347823378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:43,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555558526] [2021-07-09 18:24:43,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:43,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:24:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:43,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555558526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:43,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:43,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-09 18:24:43,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049706667] [2021-07-09 18:24:43,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:24:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:24:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:24:43,153 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:43,217 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-07-09 18:24:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:24:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-07-09 18:24:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:43,220 INFO L225 Difference]: With dead ends: 284 [2021-07-09 18:24:43,220 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 18:24:43,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:24:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 18:24:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-07-09 18:24:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-07-09 18:24:43,236 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-07-09 18:24:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:43,236 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-07-09 18:24:43,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-07-09 18:24:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:24:43,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:43,239 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:43,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:43,461 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-07-09 18:24:43,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:43,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298920418] [2021-07-09 18:24:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:43,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:43,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298920418] [2021-07-09 18:24:43,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298920418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:43,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895326272] [2021-07-09 18:24:43,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:43,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:24:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:43,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:24:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:44,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-07-09 18:24:44,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:44,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:44,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:44,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-07-09 18:24:44,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:44,350 INFO L388 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 20 treesize of output 38 [2021-07-09 18:24:44,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:44,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:44,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:44,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-07-09 18:24:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895326272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:44,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:44,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-07-09 18:24:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412305279] [2021-07-09 18:24:44,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:24:44,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:24:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:24:44,536 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:46,648 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-07-09 18:24:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:24:46,651 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:24:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:46,658 INFO L225 Difference]: With dead ends: 650 [2021-07-09 18:24:46,658 INFO L226 Difference]: Without dead ends: 573 [2021-07-09 18:24:46,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1627.5ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:24:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-09 18:24:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-07-09 18:24:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-07-09 18:24:46,698 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-07-09 18:24:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:46,698 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-07-09 18:24:46,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-07-09 18:24:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:24:46,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:46,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:46,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:46,932 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-07-09 18:24:46,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:46,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923124867] [2021-07-09 18:24:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:24:47,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:47,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923124867] [2021-07-09 18:24:47,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923124867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:47,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010667233] [2021-07-09 18:24:47,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:47,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:47,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:24:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:47,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:47,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:24:47,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:47,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:47,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:47,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:47,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:47,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:24:47,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:47,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:47,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:47,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-09 18:24:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:47,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010667233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:47,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:47,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-09 18:24:47,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202298343] [2021-07-09 18:24:47,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:24:47,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:24:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:47,727 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:48,361 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-07-09 18:24:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:24:48,362 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:24:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:48,366 INFO L225 Difference]: With dead ends: 1023 [2021-07-09 18:24:48,366 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 18:24:48,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:24:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 18:24:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-07-09 18:24:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-07-09 18:24:48,398 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-07-09 18:24:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:48,399 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-07-09 18:24:48,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-07-09 18:24:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:24:48,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:48,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:48,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:48,625 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-07-09 18:24:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:48,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022748209] [2021-07-09 18:24:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:48,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022748209] [2021-07-09 18:24:48,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022748209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940935987] [2021-07-09 18:24:48,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:48,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:24:48,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:24:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:49,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:24:49,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:49,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-09 18:24:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:49,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:49,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-07-09 18:24:49,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-09 18:24:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:49,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940935987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:49,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:49,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-09 18:24:49,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256649177] [2021-07-09 18:24:49,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:49,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:49,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:49,364 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:50,195 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-07-09 18:24:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:24:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:24:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:50,199 INFO L225 Difference]: With dead ends: 1081 [2021-07-09 18:24:50,200 INFO L226 Difference]: Without dead ends: 927 [2021-07-09 18:24:50,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:24:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-09 18:24:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-07-09 18:24:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-07-09 18:24:50,215 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-07-09 18:24:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:50,215 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-07-09 18:24:50,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-07-09 18:24:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:24:50,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:50,217 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:50,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:24:50,440 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:50,441 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-07-09 18:24:50,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:50,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918429731] [2021-07-09 18:24:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:24:50,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:50,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918429731] [2021-07-09 18:24:50,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918429731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:50,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642457719] [2021-07-09 18:24:50,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:50,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:24:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:24:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:50,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:50,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:24:51,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:51,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:51,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:51,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-07-09 18:24:51,062 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:51,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-07-09 18:24:51,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:51,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:51,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:51,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-07-09 18:24:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:51,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642457719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:51,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:51,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:24:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047994077] [2021-07-09 18:24:51,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:51,086 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:52,016 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-07-09 18:24:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:24:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:24:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:52,022 INFO L225 Difference]: With dead ends: 1050 [2021-07-09 18:24:52,022 INFO L226 Difference]: Without dead ends: 939 [2021-07-09 18:24:52,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 822.6ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:24:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-09 18:24:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-07-09 18:24:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-07-09 18:24:52,040 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-07-09 18:24:52,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:52,040 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-07-09 18:24:52,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:52,040 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-07-09 18:24:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:24:52,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:52,043 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:52,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:52,257 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-07-09 18:24:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:52,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275429140] [2021-07-09 18:24:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:52,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:52,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275429140] [2021-07-09 18:24:52,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275429140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:52,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237868634] [2021-07-09 18:24:52,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:24:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:52,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:24:52,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:52,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:52,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:52,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:52,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:52,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:24:52,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:52,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:52,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:52,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-09 18:24:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237868634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-09 18:24:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257598280] [2021-07-09 18:24:52,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:52,933 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:53,549 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-07-09 18:24:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:24:53,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:24:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:53,553 INFO L225 Difference]: With dead ends: 1045 [2021-07-09 18:24:53,554 INFO L226 Difference]: Without dead ends: 947 [2021-07-09 18:24:53,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-07-09 18:24:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-07-09 18:24:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-07-09 18:24:53,568 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-07-09 18:24:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:53,568 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-07-09 18:24:53,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-07-09 18:24:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:24:53,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:53,569 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:53,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:53,785 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-07-09 18:24:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:53,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272973465] [2021-07-09 18:24:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:53,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:53,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272973465] [2021-07-09 18:24:53,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272973465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:53,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451972217] [2021-07-09 18:24:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:53,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:24:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:53,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451972217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:53,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:53,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-09 18:24:53,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295080047] [2021-07-09 18:24:53,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:24:53,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:24:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:24:53,984 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:54,066 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-07-09 18:24:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:24:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 18:24:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:54,071 INFO L225 Difference]: With dead ends: 882 [2021-07-09 18:24:54,071 INFO L226 Difference]: Without dead ends: 844 [2021-07-09 18:24:54,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:24:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-07-09 18:24:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-07-09 18:24:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-07-09 18:24:54,087 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-07-09 18:24:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:54,087 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-07-09 18:24:54,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-07-09 18:24:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:24:54,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:54,089 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:54,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:24:54,309 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-07-09 18:24:54,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:54,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017541281] [2021-07-09 18:24:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:54,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:54,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017541281] [2021-07-09 18:24:54,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017541281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:54,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176572287] [2021-07-09 18:24:54,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:54,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:24:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:24:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:55,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,170 INFO L388 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 45 treesize of output 53 [2021-07-09 18:24:55,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:55,218 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-07-09 18:24:55,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:55,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-07-09 18:24:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:55,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:24:55,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:55,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:55,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-07-09 18:24:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176572287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:55,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:55,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-07-09 18:24:55,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056569997] [2021-07-09 18:24:55,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:24:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:24:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:24:55,668 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:59,594 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-07-09 18:24:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:24:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:24:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:59,604 INFO L225 Difference]: With dead ends: 2812 [2021-07-09 18:24:59,604 INFO L226 Difference]: Without dead ends: 2548 [2021-07-09 18:24:59,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3299.9ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 18:24:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-07-09 18:24:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-07-09 18:24:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-07-09 18:24:59,634 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-07-09 18:24:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:59,634 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-07-09 18:24:59,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-07-09 18:24:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:24:59,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:59,636 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:59,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:59,861 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-07-09 18:24:59,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:59,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520969276] [2021-07-09 18:24:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:00,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:00,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520969276] [2021-07-09 18:25:00,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520969276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:00,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670775581] [2021-07-09 18:25:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:00,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:00,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:25:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:00,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:00,970 INFO L388 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 42 treesize of output 52 [2021-07-09 18:25:00,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,027 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-09 18:25:01,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:01,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-09 18:25:01,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:01,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-07-09 18:25:01,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-09 18:25:01,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:01,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-07-09 18:25:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:01,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670775581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:01,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:01,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-09 18:25:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602626639] [2021-07-09 18:25:01,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:25:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:25:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:25:01,612 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:03,778 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-07-09 18:25:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:25:03,778 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:25:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:03,785 INFO L225 Difference]: With dead ends: 2302 [2021-07-09 18:25:03,786 INFO L226 Difference]: Without dead ends: 2145 [2021-07-09 18:25:03,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 2048.8ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:25:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-09 18:25:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-07-09 18:25:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-07-09 18:25:03,813 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-07-09 18:25:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:03,813 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-07-09 18:25:03,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-07-09 18:25:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:03,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:03,815 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:04,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:25:04,033 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-07-09 18:25:04,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:04,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669769771] [2021-07-09 18:25:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:04,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:04,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669769771] [2021-07-09 18:25:04,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669769771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:04,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884180554] [2021-07-09 18:25:04,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:04,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:25:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:25:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:05,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:05,038 INFO L388 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 40 treesize of output 50 [2021-07-09 18:25:05,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:05,086 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-07-09 18:25:05,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:05,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-07-09 18:25:05,174 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:25:05,174 INFO L388 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 33 treesize of output 13 [2021-07-09 18:25:05,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:05,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:05,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:05,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-07-09 18:25:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:05,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884180554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:05,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:05,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:25:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282511151] [2021-07-09 18:25:05,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:25:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:25:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:25:05,193 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:07,375 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-07-09 18:25:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:25:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:25:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:07,390 INFO L225 Difference]: With dead ends: 2428 [2021-07-09 18:25:07,391 INFO L226 Difference]: Without dead ends: 2232 [2021-07-09 18:25:07,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1859.5ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:25:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-07-09 18:25:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-07-09 18:25:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-07-09 18:25:07,417 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-07-09 18:25:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:07,417 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-07-09 18:25:07,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-07-09 18:25:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:07,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:07,420 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:07,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:25:07,633 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-07-09 18:25:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662342603] [2021-07-09 18:25:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:07,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662342603] [2021-07-09 18:25:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662342603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273225662] [2021-07-09 18:25:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:08,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:25:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:25:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:08,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:08,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 77 [2021-07-09 18:25:08,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,989 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-07-09 18:25:09,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:09,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-07-09 18:25:09,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:09,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:09,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-07-09 18:25:09,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:25:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:09,876 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-07-09 18:25:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-07-09 18:25:09,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:09,901 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-07-09 18:25:09,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:09,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-07-09 18:25:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:09,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273225662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:09,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:09,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-09 18:25:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199178786] [2021-07-09 18:25:09,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:25:09,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:25:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:25:09,995 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:11,305 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-07-09 18:25:13,336 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:25:29,585 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 18:25:30,258 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-09 18:25:30,712 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-09 18:25:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:30,945 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-07-09 18:25:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-07-09 18:25:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:25:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:30,958 INFO L225 Difference]: With dead ends: 4013 [2021-07-09 18:25:30,958 INFO L226 Difference]: Without dead ends: 3813 [2021-07-09 18:25:30,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 12547.8ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-07-09 18:25:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-07-09 18:25:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-07-09 18:25:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-07-09 18:25:30,999 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-07-09 18:25:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:31,000 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-07-09 18:25:31,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-07-09 18:25:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:31,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:31,002 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:31,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:31,223 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-07-09 18:25:31,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:31,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038982409] [2021-07-09 18:25:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:31,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038982409] [2021-07-09 18:25:31,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038982409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845623784] [2021-07-09 18:25:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:25:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:32,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,302 INFO L388 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 42 treesize of output 52 [2021-07-09 18:25:32,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,346 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-07-09 18:25:32,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:32,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-07-09 18:25:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:32,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-07-09 18:25:32,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-09 18:25:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:32,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845623784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:32,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:32,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-09 18:25:32,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032123591] [2021-07-09 18:25:32,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:25:32,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:32,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:25:32,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:25:32,456 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:34,602 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-07-09 18:25:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:25:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:25:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:34,614 INFO L225 Difference]: With dead ends: 4028 [2021-07-09 18:25:34,614 INFO L226 Difference]: Without dead ends: 3805 [2021-07-09 18:25:34,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:25:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-09 18:25:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-07-09 18:25:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-07-09 18:25:34,653 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-07-09 18:25:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:34,653 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-07-09 18:25:34,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-07-09 18:25:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:34,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:34,656 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:34,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:25:34,873 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-07-09 18:25:34,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:34,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929878688] [2021-07-09 18:25:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:35,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:35,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929878688] [2021-07-09 18:25:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929878688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:35,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42198064] [2021-07-09 18:25:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:35,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:35,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:25:35,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:35,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:35,988 INFO L388 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 42 treesize of output 52 [2021-07-09 18:25:35,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:36,043 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-09 18:25:36,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:36,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-09 18:25:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:36,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:36,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:36,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:36,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:36,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-07-09 18:25:36,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:36,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:36,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:36,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-09 18:25:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:36,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42198064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:36,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:36,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-09 18:25:36,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813169781] [2021-07-09 18:25:36,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:25:36,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:36,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:25:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:25:36,220 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:38,508 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-07-09 18:25:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:25:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:25:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:38,547 INFO L225 Difference]: With dead ends: 4414 [2021-07-09 18:25:38,547 INFO L226 Difference]: Without dead ends: 4155 [2021-07-09 18:25:38,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2009.5ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:25:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-07-09 18:25:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-07-09 18:25:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-07-09 18:25:38,592 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-07-09 18:25:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:38,592 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-07-09 18:25:38,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-07-09 18:25:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:25:38,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:38,600 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:38,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:38,820 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-07-09 18:25:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:38,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936231873] [2021-07-09 18:25:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:39,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:39,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936231873] [2021-07-09 18:25:39,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936231873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:39,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398723976] [2021-07-09 18:25:39,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:39,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:25:39,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:25:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:39,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:39,686 INFO L388 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 40 treesize of output 50 [2021-07-09 18:25:39,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:39,745 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-07-09 18:25:39,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:39,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-07-09 18:25:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,150 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-07-09 18:25:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-07-09 18:25:40,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:40,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:40,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-07-09 18:25:40,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 18:25:40,333 INFO L628 ElimStorePlain]: treesize reduction 43, result has 64.2 percent of original size [2021-07-09 18:25:40,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:25:40,348 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-07-09 18:25:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:40,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398723976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:40,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:40,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-07-09 18:25:40,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597879194] [2021-07-09 18:25:40,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:25:40,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:40,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:25:40,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:25:40,467 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:43,627 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-07-09 18:25:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:25:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:25:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:43,635 INFO L225 Difference]: With dead ends: 3956 [2021-07-09 18:25:43,635 INFO L226 Difference]: Without dead ends: 3795 [2021-07-09 18:25:43,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2696.1ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:25:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-07-09 18:25:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-07-09 18:25:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-07-09 18:25:43,685 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-07-09 18:25:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:43,685 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-07-09 18:25:43,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-07-09 18:25:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:25:43,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:43,689 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:43,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 18:25:43,905 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-07-09 18:25:43,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:43,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179867576] [2021-07-09 18:25:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:43,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:43,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179867576] [2021-07-09 18:25:43,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179867576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:43,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374239809] [2021-07-09 18:25:43,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:44,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:25:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:44,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374239809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:44,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:44,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-09 18:25:44,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348400596] [2021-07-09 18:25:44,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:25:44,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:25:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:25:44,090 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:44,189 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-07-09 18:25:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:25:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 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 45 [2021-07-09 18:25:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:44,194 INFO L225 Difference]: With dead ends: 2387 [2021-07-09 18:25:44,195 INFO L226 Difference]: Without dead ends: 2337 [2021-07-09 18:25:44,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:25:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-07-09 18:25:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-07-09 18:25:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-07-09 18:25:44,230 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-07-09 18:25:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:44,231 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-07-09 18:25:44,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-07-09 18:25:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:25:44,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:44,235 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:44,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 18:25:44,458 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-07-09 18:25:44,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:44,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871464793] [2021-07-09 18:25:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-09 18:25:44,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:44,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871464793] [2021-07-09 18:25:44,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871464793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:44,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883066160] [2021-07-09 18:25:44,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:44,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:25:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:25:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 18:25:44,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883066160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:44,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:44,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:25:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345705253] [2021-07-09 18:25:44,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:25:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:25:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:25:44,594 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-07-09 18:25:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:44,626 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-07-09 18:25:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:25:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 46 [2021-07-09 18:25:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:44,631 INFO L225 Difference]: With dead ends: 2477 [2021-07-09 18:25:44,631 INFO L226 Difference]: Without dead ends: 2477 [2021-07-09 18:25:44,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:25:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-07-09 18:25:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-07-09 18:25:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-07-09 18:25:44,663 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-07-09 18:25:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:44,663 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-07-09 18:25:44,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-07-09 18:25:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-07-09 18:25:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:25:44,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:44,667 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:44,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-09 18:25:44,889 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:44,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-07-09 18:25:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053112292] [2021-07-09 18:25:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:25:44,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:44,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053112292] [2021-07-09 18:25:44,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053112292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:44,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047881536] [2021-07-09 18:25:44,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:44,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:25:44,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:25:44,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:25:45,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047881536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:45,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:25:45,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729615703] [2021-07-09 18:25:45,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:25:45,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:25:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:25:45,067 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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) [2021-07-09 18:25:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:45,094 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-07-09 18:25:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:25:45,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 46 [2021-07-09 18:25:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:45,097 INFO L225 Difference]: With dead ends: 1749 [2021-07-09 18:25:45,097 INFO L226 Difference]: Without dead ends: 1749 [2021-07-09 18:25:45,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:25:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-07-09 18:25:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-07-09 18:25:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-07-09 18:25:45,122 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-07-09 18:25:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:45,122 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-07-09 18:25:45,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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) [2021-07-09 18:25:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-07-09 18:25:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:25:45,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:45,125 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:45,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-07-09 18:25:45,348 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-07-09 18:25:45,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:45,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513551464] [2021-07-09 18:25:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:45,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:45,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513551464] [2021-07-09 18:25:45,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513551464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030327672] [2021-07-09 18:25:45,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:25:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:46,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 61 treesize of output 87 [2021-07-09 18:25:46,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:46,698 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-07-09 18:25:46,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:46,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-07-09 18:25:47,153 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-09 18:25:47,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 16 [2021-07-09 18:25:47,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:47,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:47,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:47,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-07-09 18:25:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:47,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030327672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:47,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:47,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-07-09 18:25:47,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860986738] [2021-07-09 18:25:47,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 18:25:47,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 18:25:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:25:47,169 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:50,622 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-07-09 18:25:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:25:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 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 50 [2021-07-09 18:25:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:50,629 INFO L225 Difference]: With dead ends: 2993 [2021-07-09 18:25:50,629 INFO L226 Difference]: Without dead ends: 2897 [2021-07-09 18:25:50,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2742.5ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:25:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-07-09 18:25:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-07-09 18:25:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-07-09 18:25:50,660 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-07-09 18:25:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:50,660 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-07-09 18:25:50,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-07-09 18:25:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:25:50,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:50,664 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:50,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:50,886 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-07-09 18:25:50,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:50,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434521677] [2021-07-09 18:25:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:51,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434521677] [2021-07-09 18:25:51,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434521677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:51,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506912437] [2021-07-09 18:25:51,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:51,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:25:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:52,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:52,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-07-09 18:25:52,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:52,749 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-07-09 18:25:52,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:52,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-07-09 18:25:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:53,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-09 18:25:53,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:53,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-07-09 18:25:53,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:53,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:53,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:53,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-07-09 18:25:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:53,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506912437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:53,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:53,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-07-09 18:25:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753220877] [2021-07-09 18:25:53,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:25:53,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:25:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:25:53,277 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:59,007 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-07-09 18:25:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:25:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 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 50 [2021-07-09 18:25:59,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:59,013 INFO L225 Difference]: With dead ends: 3235 [2021-07-09 18:25:59,013 INFO L226 Difference]: Without dead ends: 3122 [2021-07-09 18:25:59,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4490.8ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:25:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-07-09 18:25:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-07-09 18:25:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-07-09 18:25:59,043 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-07-09 18:25:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:59,044 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-07-09 18:25:59,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-07-09 18:25:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 18:25:59,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:59,047 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:59,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-09 18:25:59,262 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-07-09 18:25:59,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:59,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832139892] [2021-07-09 18:25:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:59,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:59,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832139892] [2021-07-09 18:25:59,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832139892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:59,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819405073] [2021-07-09 18:25:59,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:59,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:25:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:25:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:02,823 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:26:02,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:02,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 82 [2021-07-09 18:26:02,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:03,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:03,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 82 [2021-07-09 18:26:03,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:03,227 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-07-09 18:26:03,227 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-07-09 18:26:03,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-07-09 18:26:03,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-07-09 18:26:18,885 WARN L205 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:26:52,635 WARN L205 SmtUtils]: Spent 13.75 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-07-09 18:26:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:52,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:52,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:52,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:52,955 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-07-09 18:26:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-07-09 18:26:53,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:53,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:53,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:53,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:53,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-07-09 18:26:54,115 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-07-09 18:26:54,233 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-07-09 18:26:54,370 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-07-09 18:26:55,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 18:26:55,435 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-07-09 18:26:55,435 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-07-09 18:26:55,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:26:55,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-07-09 18:26:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:55,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819405073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:55,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:55,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-07-09 18:26:55,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591169994] [2021-07-09 18:26:55,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:26:55,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:55,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:26:55,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2264, Unknown=7, NotChecked=0, Total=2550 [2021-07-09 18:26:55,629 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:15,703 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-07-09 18:27:24,866 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-07-09 18:27:45,833 WARN L205 SmtUtils]: Spent 9.22 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-07-09 18:27:59,399 WARN L205 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-07-09 18:28:11,427 WARN L205 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-09 18:28:17,942 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-07-09 18:28:36,235 WARN L205 SmtUtils]: Spent 12.90 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-07-09 18:28:41,005 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-07-09 18:28:51,909 WARN L205 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-07-09 18:29:04,662 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-07-09 18:29:11,600 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-07-09 18:29:15,280 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-07-09 18:29:26,783 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-07-09 18:29:31,561 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-07-09 18:29:43,524 WARN L205 SmtUtils]: Spent 9.28 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-07-09 18:30:04,745 WARN L205 SmtUtils]: Spent 16.04 s on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2021-07-09 18:30:10,520 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-07-09 18:30:18,403 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-07-09 18:30:43,524 WARN L205 SmtUtils]: Spent 15.11 s on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-07-09 18:30:56,405 WARN L205 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-07-09 18:31:13,199 WARN L205 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-07-09 18:31:25,919 WARN L205 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-07-09 18:31:46,049 WARN L205 SmtUtils]: Spent 11.26 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-07-09 18:31:54,700 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-07-09 18:32:20,493 WARN L205 SmtUtils]: Spent 13.20 s on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-07-09 18:32:47,911 WARN L205 SmtUtils]: Spent 14.00 s on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2021-07-09 18:32:57,933 WARN L205 SmtUtils]: Spent 8.97 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-07-09 18:33:23,422 WARN L205 SmtUtils]: Spent 16.51 s on a formula simplification. DAG size of input: 126 DAG size of output: 75 [2021-07-09 18:33:45,131 WARN L205 SmtUtils]: Spent 13.60 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-07-09 18:34:10,964 WARN L205 SmtUtils]: Spent 12.93 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-07-09 18:34:20,205 WARN L205 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-07-09 18:34:35,955 WARN L205 SmtUtils]: Spent 9.74 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-07-09 18:35:14,158 WARN L205 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-07-09 18:35:43,929 WARN L205 SmtUtils]: Spent 13.04 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-07-09 18:35:56,962 WARN L205 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-07-09 18:36:10,355 WARN L205 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:36:24,123 WARN L205 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-07-09 18:37:22,338 WARN L205 SmtUtils]: Spent 17.00 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-07-09 18:37:41,354 WARN L205 SmtUtils]: Spent 11.53 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-07-09 18:37:56,022 WARN L205 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-07-09 18:38:12,025 WARN L205 SmtUtils]: Spent 9.57 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-07-09 18:38:34,675 WARN L205 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-07-09 18:38:59,092 WARN L205 SmtUtils]: Spent 13.34 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 Received shutdown request... [2021-07-09 18:39:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-09 18:39:10,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:10,911 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:39:10,913 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:39:10,914 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:39:10,914 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:39:10 BasicIcfg [2021-07-09 18:39:10,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:39:10,914 INFO L168 Benchmark]: Toolchain (without parser) took 869613.95 ms. Allocated memory was 186.6 MB in the beginning and 345.0 MB in the end (delta: 158.3 MB). Free memory was 166.6 MB in the beginning and 200.4 MB in the end (delta: -33.8 MB). Peak memory consumption was 125.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:10,914 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:39:10,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.13 ms. Allocated memory is still 186.6 MB. Free memory was 166.4 MB in the beginning and 165.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:10,915 INFO L168 Benchmark]: Boogie Preprocessor took 18.52 ms. Allocated memory is still 186.6 MB. Free memory was 165.0 MB in the beginning and 163.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:10,915 INFO L168 Benchmark]: RCFGBuilder took 307.15 ms. Allocated memory is still 186.6 MB. Free memory was 163.9 MB in the beginning and 151.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:10,915 INFO L168 Benchmark]: TraceAbstraction took 869257.35 ms. Allocated memory was 186.6 MB in the beginning and 345.0 MB in the end (delta: 158.3 MB). Free memory was 150.5 MB in the beginning and 200.4 MB in the end (delta: -49.9 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:39:10,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.13 ms. Allocated memory is still 186.6 MB. Free memory was 166.4 MB in the beginning and 165.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.52 ms. Allocated memory is still 186.6 MB. Free memory was 165.0 MB in the beginning and 163.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.15 ms. Allocated memory is still 186.6 MB. Free memory was 163.9 MB in the beginning and 151.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 869257.35 ms. Allocated memory was 186.6 MB in the beginning and 345.0 MB in the end (delta: 158.3 MB). Free memory was 150.5 MB in the beginning and 200.4 MB in the end (delta: -49.9 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 110 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 148 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 869144.6ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 70.2ms, AutomataDifference: 786900.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1083 SDtfs, 5815 SDslu, 10459 SDs, 0 SdLazy, 26666 SolverSat, 3491 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 91603.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1842 GetRequests, 588 SyntacticMatches, 38 SemanticMatches, 1215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40652 ImplicationChecksByTransitivity, 743178.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 595.2ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 127.1ms SsaConstructionTime, 492.7ms SatisfiabilityAnalysisTime, 75680.3ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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