/usr/bin/java -Xmx16000000000 -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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 20:24:43,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 20:24:43,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 20:24:43,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-01 20:24:43,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-01 20:24:43,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-01 20:24:43,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-01 20:24:43,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-01 20:24:43,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-01 20:24:43,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-01 20:24:43,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-01 20:24:43,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-01 20:24:43,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-01 20:24:43,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-01 20:24:43,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-01 20:24:43,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-01 20:24:43,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-01 20:24:43,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-01 20:24:43,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-01 20:24:43,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-01 20:24:43,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-01 20:24:43,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-01 20:24:43,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-01 20:24:43,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-01 20:24:43,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-01 20:24:43,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-01 20:24:43,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-01 20:24:43,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-01 20:24:43,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-01 20:24:43,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-01 20:24:43,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-01 20:24:43,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-01 20:24:43,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-01 20:24:43,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-01 20:24:43,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-01 20:24:43,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-01 20:24:43,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-01 20:24:43,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-01 20:24:43,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-01 20:24:43,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-01 20:24:43,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-01 20:24:43,946 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 [2021-06-01 20:24:43,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 20:24:43,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 20:24:43,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 20:24:43,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 20:24:43,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 20:24:43,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 20:24:43,968 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 20:24:43,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 20:24:43,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 20:24:43,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 20:24:43,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 20:24:43,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 20:24:43,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 20:24:43,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 20:24:43,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 20:24:43,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 20:24:43,971 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 20:24:43,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 20:24:43,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 20:24:44,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 20:24:44,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 20:24:44,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 20:24:44,270 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 20:24:44,271 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 20:24:44,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-06-01 20:24:44,272 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-06-01 20:24:44,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 20:24:44,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 20:24:44,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 20:24:44,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 20:24:44,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 20:24:44,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 20:24:44,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 20:24:44,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 20:24:44,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 20:24:44,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/1) ... [2021-06-01 20:24:44,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 20:24:44,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 20:24:44,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 20:24:44,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 20:24:44,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (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 [2021-06-01 20:24:44,438 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-01 20:24:44,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-01 20:24:44,439 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-01 20:24:44,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-01 20:24:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-01 20:24:44,439 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-01 20:24:44,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 20:24:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 20:24:44,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 20:24:44,440 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 20:24:44,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 20:24:44,605 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-01 20:24:44,606 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 08:24:44 BoogieIcfgContainer [2021-06-01 20:24:44,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 20:24:44,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 20:24:44,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 20:24:44,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 20:24:44,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:24:44" (1/2) ... [2021-06-01 20:24:44,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5ed0f6 and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 08:24:44, skipping insertion in model container [2021-06-01 20:24:44,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 08:24:44" (2/2) ... [2021-06-01 20:24:44,613 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-06-01 20:24:44,617 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 20:24:44,617 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 20:24:44,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 20:24:44,618 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 20:24:44,642 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-01 20:24:44,661 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-01 20:24:44,679 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 20:24:44,679 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 20:24:44,679 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 20:24:44,679 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 20:24:44,679 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 20:24:44,679 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 20:24:44,680 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 20:24:44,680 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 20:24:44,713 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-01 20:24:44,749 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:24:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:24:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-01 20:24:44,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:44,758 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:24:44,758 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-01 20:24:44,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:44,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007690723] [2021-06-01 20:24:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:44,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:44,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007690723] [2021-06-01 20:24:44,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007690723] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 20:24:44,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 20:24:44,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 20:24:44,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716401558] [2021-06-01 20:24:44,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-01 20:24:44,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-01 20:24:44,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 20:24:44,963 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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) [2021-06-01 20:24:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:44,995 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-01 20:24:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-01 20:24:44,998 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 [2021-06-01 20:24:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:45,013 INFO L225 Difference]: With dead ends: 104 [2021-06-01 20:24:45,013 INFO L226 Difference]: Without dead ends: 87 [2021-06-01 20:24:45,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 20:24:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-01 20:24:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-01 20:24:45,062 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) [2021-06-01 20:24:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-01 20:24:45,065 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-01 20:24:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:45,066 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-01 20:24:45,066 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) [2021-06-01 20:24:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-01 20:24:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 20:24:45,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:45,068 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:24:45,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 20:24:45,068 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:45,074 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-01 20:24:45,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:45,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861548718] [2021-06-01 20:24:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:45,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861548718] [2021-06-01 20:24:45,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861548718] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 20:24:45,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 20:24:45,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 20:24:45,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520812059] [2021-06-01 20:24:45,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 20:24:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:45,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 20:24:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-01 20:24:45,169 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) [2021-06-01 20:24:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:45,212 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-01 20:24:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 20:24:45,213 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 [2021-06-01 20:24:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:45,216 INFO L225 Difference]: With dead ends: 91 [2021-06-01 20:24:45,216 INFO L226 Difference]: Without dead ends: 83 [2021-06-01 20:24:45,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-01 20:24:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-01 20:24:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-01 20:24:45,222 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) [2021-06-01 20:24:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-01 20:24:45,223 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-01 20:24:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:45,223 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-01 20:24:45,223 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) [2021-06-01 20:24:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-01 20:24:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 20:24:45,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:45,224 INFO L554 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] [2021-06-01 20:24:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-01 20:24:45,226 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-01 20:24:45,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:45,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534233055] [2021-06-01 20:24:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:45,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:45,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534233055] [2021-06-01 20:24:45,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534233055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:45,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362411841] [2021-06-01 20:24:45,415 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 [2021-06-01 20:24:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 20:24:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:45,665 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 [2021-06-01 20:24:45,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:45,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:45,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:45,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-01 20:24:45,727 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 [2021-06-01 20:24:45,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:45,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:45,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:45,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-01 20:24:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:45,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362411841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:45,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:45,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-01 20:24:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751053631] [2021-06-01 20:24:45,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 20:24:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 20:24:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-01 20:24:45,782 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) [2021-06-01 20:24:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:45,911 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-01 20:24:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 20:24:45,912 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 [2021-06-01 20:24:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:45,915 INFO L225 Difference]: With dead ends: 154 [2021-06-01 20:24:45,915 INFO L226 Difference]: Without dead ends: 137 [2021-06-01 20:24:45,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-01 20:24:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-01 20:24:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-01 20:24:45,936 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) [2021-06-01 20:24:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-01 20:24:45,937 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-01 20:24:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:45,937 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-01 20:24:45,937 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) [2021-06-01 20:24:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-01 20:24:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:24:45,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:45,939 INFO L554 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] [2021-06-01 20:24:46,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-01 20:24:46,140 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-01 20:24:46,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:46,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288201707] [2021-06-01 20:24:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:46,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288201707] [2021-06-01 20:24:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288201707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350958524] [2021-06-01 20:24:46,207 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 [2021-06-01 20:24:46,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:24:46,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:46,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-01 20:24:46,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:46,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350958524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:46,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:46,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-01 20:24:46,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511678773] [2021-06-01 20:24:46,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 20:24:46,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 20:24:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-01 20:24:46,316 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) [2021-06-01 20:24:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:46,402 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-01 20:24:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 20:24:46,403 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 [2021-06-01 20:24:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:46,404 INFO L225 Difference]: With dead ends: 284 [2021-06-01 20:24:46,404 INFO L226 Difference]: Without dead ends: 264 [2021-06-01 20:24:46,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-01 20:24:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-01 20:24:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-01 20:24:46,415 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) [2021-06-01 20:24:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-01 20:24:46,417 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-01 20:24:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:46,417 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-01 20:24:46,417 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) [2021-06-01 20:24:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-01 20:24:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-01 20:24:46,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:46,419 INFO L554 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] [2021-06-01 20:24:46,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:24:46,642 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:46,642 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-01 20:24:46,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:46,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282381963] [2021-06-01 20:24:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:46,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:46,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282381963] [2021-06-01 20:24:46,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282381963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:46,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172802777] [2021-06-01 20:24:46,921 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 [2021-06-01 20:24:46,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 20:24:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:46,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-01 20:24:46,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:47,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:47,222 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 [2021-06-01 20:24:47,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:47,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:47,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:47,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-01 20:24:47,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:47,503 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 [2021-06-01 20:24:47,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-01 20:24:47,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:47,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:47,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-01 20:24:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172802777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:47,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:47,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-01 20:24:47,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559619219] [2021-06-01 20:24:47,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:24:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:47,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:24:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:24:47,686 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) [2021-06-01 20:24:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:49,586 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-01 20:24:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-01 20:24:49,589 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 [2021-06-01 20:24:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:49,595 INFO L225 Difference]: With dead ends: 650 [2021-06-01 20:24:49,595 INFO L226 Difference]: Without dead ends: 573 [2021-06-01 20:24:49,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1604.6ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-01 20:24:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-01 20:24:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-01 20:24:49,628 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) [2021-06-01 20:24:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-01 20:24:49,631 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-01 20:24:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:49,631 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-01 20:24:49,631 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) [2021-06-01 20:24:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-01 20:24:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-01 20:24:49,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:49,640 INFO L554 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] [2021-06-01 20:24:49,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:24:49,841 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-01 20:24:49,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:49,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457593510] [2021-06-01 20:24:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:24:50,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:50,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457593510] [2021-06-01 20:24:50,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457593510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:50,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398446791] [2021-06-01 20:24:50,100 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 [2021-06-01 20:24:50,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:24:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:50,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-01 20:24:50,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:50,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:50,473 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 [2021-06-01 20:24:50,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:50,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:50,489 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. [2021-06-01 20:24:50,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-01 20:24:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:50,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:24:50,596 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 [2021-06-01 20:24:50,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:50,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:50,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:50,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-01 20:24:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:50,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398446791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:50,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:50,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-01 20:24:50,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873211639] [2021-06-01 20:24:50,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-01 20:24:50,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:50,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-01 20:24:50,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-01 20:24:50,619 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) [2021-06-01 20:24:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:51,367 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-01 20:24:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 20:24:51,367 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 [2021-06-01 20:24:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:51,371 INFO L225 Difference]: With dead ends: 1023 [2021-06-01 20:24:51,371 INFO L226 Difference]: Without dead ends: 878 [2021-06-01 20:24:51,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 661.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-01 20:24:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-01 20:24:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-01 20:24:51,388 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) [2021-06-01 20:24:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-01 20:24:51,390 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-01 20:24:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:51,392 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-01 20:24:51,392 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) [2021-06-01 20:24:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-01 20:24:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-01 20:24:51,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:51,396 INFO L554 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] [2021-06-01 20:24:51,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:24:51,605 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-01 20:24:51,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:51,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113741210] [2021-06-01 20:24:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:51,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:51,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113741210] [2021-06-01 20:24:51,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113741210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:51,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057083773] [2021-06-01 20:24:51,883 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 [2021-06-01 20:24:51,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 20:24:51,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 20:24:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:52,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:52,223 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 [2021-06-01 20:24:52,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:52,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:52,239 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. [2021-06-01 20:24:52,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-01 20:24:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:24:52,354 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 [2021-06-01 20:24:52,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:52,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:52,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:52,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-01 20:24:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:52,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057083773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:52,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:52,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-01 20:24:52,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655650314] [2021-06-01 20:24:52,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:24:52,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:24:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:24:52,378 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) [2021-06-01 20:24:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:53,197 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-01 20:24:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 20:24:53,198 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 [2021-06-01 20:24:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:53,202 INFO L225 Difference]: With dead ends: 1081 [2021-06-01 20:24:53,202 INFO L226 Difference]: Without dead ends: 927 [2021-06-01 20:24:53,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-01 20:24:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-01 20:24:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-01 20:24:53,216 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) [2021-06-01 20:24:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-01 20:24:53,218 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-01 20:24:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:53,219 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-01 20:24:53,219 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) [2021-06-01 20:24:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-01 20:24:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-01 20:24:53,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:53,220 INFO L554 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] [2021-06-01 20:24:53,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-01 20:24:53,433 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-01 20:24:53,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:53,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771025091] [2021-06-01 20:24:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:24:53,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771025091] [2021-06-01 20:24:53,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771025091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705294957] [2021-06-01 20:24:53,669 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 [2021-06-01 20:24:53,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 20:24:53,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:53,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-01 20:24:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:53,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:53,954 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 [2021-06-01 20:24:53,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:53,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:53,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:53,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-06-01 20:24:54,013 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-01 20:24:54,013 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 [2021-06-01 20:24:54,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:54,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:54,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:54,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-06-01 20:24:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:54,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705294957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:54,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:54,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-01 20:24:54,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576399003] [2021-06-01 20:24:54,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-01 20:24:54,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-01 20:24:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-01 20:24:54,035 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) [2021-06-01 20:24:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:54,804 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-06-01 20:24:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-01 20:24:54,804 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 [2021-06-01 20:24:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:54,808 INFO L225 Difference]: With dead ends: 1050 [2021-06-01 20:24:54,808 INFO L226 Difference]: Without dead ends: 939 [2021-06-01 20:24:54,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-01 20:24:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-01 20:24:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-06-01 20:24:54,829 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) [2021-06-01 20:24:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-06-01 20:24:54,831 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-06-01 20:24:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:54,831 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-06-01 20:24:54,831 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) [2021-06-01 20:24:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-06-01 20:24:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-01 20:24:54,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:54,832 INFO L554 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] [2021-06-01 20:24:55,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:24:55,049 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-01 20:24:55,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:55,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212944438] [2021-06-01 20:24:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:55,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:55,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212944438] [2021-06-01 20:24:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212944438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:55,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827146824] [2021-06-01 20:24:55,262 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 [2021-06-01 20:24:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-01 20:24:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:55,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:55,544 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 [2021-06-01 20:24:55,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:55,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:55,562 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. [2021-06-01 20:24:55,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-01 20:24:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:55,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:24:55,666 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 [2021-06-01 20:24:55,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:55,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:55,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:55,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-01 20:24:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:55,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827146824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:55,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:55,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-01 20:24:55,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530081334] [2021-06-01 20:24:55,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:24:55,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:24:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:24:55,689 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) [2021-06-01 20:24:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:56,270 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-06-01 20:24:56,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 20:24:56,271 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 [2021-06-01 20:24:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:56,274 INFO L225 Difference]: With dead ends: 1045 [2021-06-01 20:24:56,275 INFO L226 Difference]: Without dead ends: 947 [2021-06-01 20:24:56,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:24:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-01 20:24:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-06-01 20:24:56,287 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) [2021-06-01 20:24:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-06-01 20:24:56,288 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-06-01 20:24:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:56,289 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-06-01 20:24:56,289 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) [2021-06-01 20:24:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-06-01 20:24:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-01 20:24:56,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:56,290 INFO L554 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] [2021-06-01 20:24:56,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:24:56,509 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:56,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-01 20:24:56,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:56,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950260185] [2021-06-01 20:24:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:56,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:56,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950260185] [2021-06-01 20:24:56,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950260185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:56,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842886810] [2021-06-01 20:24:56,566 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 [2021-06-01 20:24:56,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:24:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 20:24:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842886810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:56,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:56,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-01 20:24:56,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563504574] [2021-06-01 20:24:56,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 20:24:56,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 20:24:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-01 20:24:56,668 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) [2021-06-01 20:24:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:24:56,739 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-06-01 20:24:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 20:24:56,739 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 [2021-06-01 20:24:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:24:56,742 INFO L225 Difference]: With dead ends: 882 [2021-06-01 20:24:56,742 INFO L226 Difference]: Without dead ends: 844 [2021-06-01 20:24:56,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-01 20:24:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-01 20:24:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-06-01 20:24:56,755 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) [2021-06-01 20:24:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-06-01 20:24:56,757 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-06-01 20:24:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:24:56,757 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-06-01 20:24:56,757 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) [2021-06-01 20:24:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-06-01 20:24:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:24:56,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:24:56,759 INFO L554 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] [2021-06-01 20:24:56,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-01 20:24:56,972 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:24:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:24:56,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-01 20:24:56,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:24:56,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13684324] [2021-06-01 20:24:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:24:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:24:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:57,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:24:57,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13684324] [2021-06-01 20:24:57,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13684324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:57,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840675681] [2021-06-01 20:24:57,358 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 [2021-06-01 20:24:57,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 20:24:57,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:24:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-01 20:24:57,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:24:57,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:57,751 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 [2021-06-01 20:24:57,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:24:57,801 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-06-01 20:24:57,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:57,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-06-01 20:24:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:58,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:24:58,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:58,111 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 [2021-06-01 20:24:58,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-01 20:24:58,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:24:58,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:24:58,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-01 20:24:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:24:58,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840675681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:24:58,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:24:58,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-01 20:24:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940450837] [2021-06-01 20:24:58,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-01 20:24:58,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:24:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-01 20:24:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-01 20:24:58,270 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) [2021-06-01 20:25:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:01,986 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-01 20:25:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-01 20:25:01,986 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 [2021-06-01 20:25:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:01,995 INFO L225 Difference]: With dead ends: 2812 [2021-06-01 20:25:01,995 INFO L226 Difference]: Without dead ends: 2548 [2021-06-01 20:25:01,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3164.2ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-01 20:25:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-01 20:25:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-01 20:25:02,021 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) [2021-06-01 20:25:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-01 20:25:02,022 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-01 20:25:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:02,022 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-01 20:25:02,023 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) [2021-06-01 20:25:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-01 20:25:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:25:02,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:02,024 INFO L554 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] [2021-06-01 20:25:02,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:25:02,247 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-01 20:25:02,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:02,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058562712] [2021-06-01 20:25:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:25:02,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058562712] [2021-06-01 20:25:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058562712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174599553] [2021-06-01 20:25:02,636 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 [2021-06-01 20:25:02,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:25:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:02,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:25:02,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:03,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:03,351 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 [2021-06-01 20:25:03,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:03,396 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-01 20:25:03,413 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. [2021-06-01 20:25:03,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-01 20:25:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:03,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:03,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:03,792 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 [2021-06-01 20:25:03,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:03,806 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 [2021-06-01 20:25:03,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:03,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:03,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:03,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-01 20:25:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:03,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174599553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:03,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:03,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-01 20:25:03,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440329577] [2021-06-01 20:25:03,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:25:03,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:25:03,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:25:03,827 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) [2021-06-01 20:25:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:06,114 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-01 20:25:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-01 20:25:06,114 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 [2021-06-01 20:25:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:06,121 INFO L225 Difference]: With dead ends: 2302 [2021-06-01 20:25:06,121 INFO L226 Difference]: Without dead ends: 2145 [2021-06-01 20:25:06,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1916.7ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-01 20:25:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-01 20:25:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-01 20:25:06,144 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) [2021-06-01 20:25:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-01 20:25:06,146 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-01 20:25:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:06,146 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-01 20:25:06,147 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) [2021-06-01 20:25:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-01 20:25:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:25:06,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:06,148 INFO L554 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] [2021-06-01 20:25:06,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-01 20:25:06,365 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:06,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-01 20:25:06,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:06,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507202296] [2021-06-01 20:25:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:06,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507202296] [2021-06-01 20:25:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507202296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618990724] [2021-06-01 20:25:06,759 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 [2021-06-01 20:25:06,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 20:25:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:06,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-01 20:25:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:07,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:07,366 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 [2021-06-01 20:25:07,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:07,410 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-06-01 20:25:07,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:07,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-06-01 20:25:07,495 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-01 20:25:07,495 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 [2021-06-01 20:25:07,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:07,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:07,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:07,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-01 20:25:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618990724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:07,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:07,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-01 20:25:07,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790401100] [2021-06-01 20:25:07,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-01 20:25:07,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-01 20:25:07,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 20:25:07,514 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) [2021-06-01 20:25:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:09,772 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-06-01 20:25:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:25:09,773 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 [2021-06-01 20:25:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:09,780 INFO L225 Difference]: With dead ends: 2428 [2021-06-01 20:25:09,780 INFO L226 Difference]: Without dead ends: 2232 [2021-06-01 20:25:09,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1768.8ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-06-01 20:25:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-01 20:25:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-06-01 20:25:09,804 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) [2021-06-01 20:25:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-06-01 20:25:09,807 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-06-01 20:25:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:09,807 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-06-01 20:25:09,807 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) [2021-06-01 20:25:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-06-01 20:25:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:25:09,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:09,809 INFO L554 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] [2021-06-01 20:25:10,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-01 20:25:10,025 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-01 20:25:10,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:10,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990324442] [2021-06-01 20:25:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:25:10,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990324442] [2021-06-01 20:25:10,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990324442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260546366] [2021-06-01 20:25:10,364 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 [2021-06-01 20:25:10,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 20:25:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-01 20:25:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:11,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:11,232 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 [2021-06-01 20:25:11,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:11,327 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-06-01 20:25:11,343 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. [2021-06-01 20:25:11,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-06-01 20:25:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:12,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:12,075 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 [2021-06-01 20:25:12,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-01 20:25:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:12,151 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-01 20:25:12,151 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 [2021-06-01 20:25:12,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:12,176 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-06-01 20:25:12,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:12,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-06-01 20:25:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:12,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260546366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:12,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:12,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-01 20:25:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975125509] [2021-06-01 20:25:12,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-01 20:25:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-01 20:25:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-06-01 20:25:12,259 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) [2021-06-01 20:25:13,958 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-01 20:25:26,483 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-01 20:25:27,098 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-01 20:25:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:27,859 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-06-01 20:25:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-01 20:25:27,860 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 [2021-06-01 20:25:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:27,869 INFO L225 Difference]: With dead ends: 4013 [2021-06-01 20:25:27,869 INFO L226 Difference]: Without dead ends: 3813 [2021-06-01 20:25:27,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 12199.1ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-06-01 20:25:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-01 20:25:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-06-01 20:25:27,902 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) [2021-06-01 20:25:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-06-01 20:25:27,905 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-06-01 20:25:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:27,905 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-06-01 20:25:27,905 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) [2021-06-01 20:25:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-06-01 20:25:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:25:27,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:27,907 INFO L554 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] [2021-06-01 20:25:28,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:25:28,130 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-01 20:25:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068841427] [2021-06-01 20:25:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:25:28,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068841427] [2021-06-01 20:25:28,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068841427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211373051] [2021-06-01 20:25:28,460 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 [2021-06-01 20:25:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:28,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:25:28,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:29,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:29,132 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 [2021-06-01 20:25:29,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:29,196 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-01 20:25:29,209 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. [2021-06-01 20:25:29,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-01 20:25:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:29,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:29,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:29,313 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 [2021-06-01 20:25:29,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:29,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:29,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:29,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-01 20:25:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:29,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211373051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:29,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:29,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-01 20:25:29,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141744765] [2021-06-01 20:25:29,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:25:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:29,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:25:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:25:29,330 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) [2021-06-01 20:25:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:31,536 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-06-01 20:25:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:25:31,536 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 [2021-06-01 20:25:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:31,547 INFO L225 Difference]: With dead ends: 4028 [2021-06-01 20:25:31,547 INFO L226 Difference]: Without dead ends: 3805 [2021-06-01 20:25:31,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1552.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-01 20:25:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-01 20:25:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-06-01 20:25:31,580 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) [2021-06-01 20:25:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-06-01 20:25:31,583 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-06-01 20:25:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:31,583 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-06-01 20:25:31,583 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) [2021-06-01 20:25:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-06-01 20:25:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:25:31,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:31,586 INFO L554 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] [2021-06-01 20:25:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-01 20:25:31,801 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-01 20:25:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604270257] [2021-06-01 20:25:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:32,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:32,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604270257] [2021-06-01 20:25:32,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604270257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:32,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879136003] [2021-06-01 20:25:32,210 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 [2021-06-01 20:25:32,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:25:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:25:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:32,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:32,943 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 [2021-06-01 20:25:32,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:32,997 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-01 20:25:33,009 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. [2021-06-01 20:25:33,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-01 20:25:33,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:33,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:33,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:33,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:33,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:33,171 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 [2021-06-01 20:25:33,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:33,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:33,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:33,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-01 20:25:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:33,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879136003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:33,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:33,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-01 20:25:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126528561] [2021-06-01 20:25:33,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:25:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:25:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:25:33,187 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) [2021-06-01 20:25:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:35,448 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-06-01 20:25:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:25:35,456 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 [2021-06-01 20:25:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:35,463 INFO L225 Difference]: With dead ends: 4414 [2021-06-01 20:25:35,464 INFO L226 Difference]: Without dead ends: 4155 [2021-06-01 20:25:35,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1866.6ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-01 20:25:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-01 20:25:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-06-01 20:25:35,501 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) [2021-06-01 20:25:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-06-01 20:25:35,505 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-06-01 20:25:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:35,505 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-06-01 20:25:35,505 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) [2021-06-01 20:25:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-06-01 20:25:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 20:25:35,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:35,508 INFO L554 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] [2021-06-01 20:25:35,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:25:35,721 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-01 20:25:35,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:35,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389298773] [2021-06-01 20:25:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389298773] [2021-06-01 20:25:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389298773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:36,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91896812] [2021-06-01 20:25:36,044 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 [2021-06-01 20:25:36,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 20:25:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-01 20:25:36,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:36,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:36,526 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 [2021-06-01 20:25:36,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:36,566 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-06-01 20:25:36,571 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. [2021-06-01 20:25:36,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-06-01 20:25:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:36,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:36,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:36,975 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 [2021-06-01 20:25:37,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-01 20:25:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:37,054 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-01 20:25:37,054 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 [2021-06-01 20:25:37,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:37,120 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-01 20:25:37,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-01 20:25:37,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-01 20:25:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:37,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91896812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:37,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:37,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-01 20:25:37,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927280353] [2021-06-01 20:25:37,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-01 20:25:37,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:37,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-01 20:25:37,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-01 20:25:37,261 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) [2021-06-01 20:25:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:40,293 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-06-01 20:25:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-01 20:25:40,294 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 [2021-06-01 20:25:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:40,299 INFO L225 Difference]: With dead ends: 3956 [2021-06-01 20:25:40,299 INFO L226 Difference]: Without dead ends: 3795 [2021-06-01 20:25:40,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2549.3ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-01 20:25:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-01 20:25:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-06-01 20:25:40,331 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) [2021-06-01 20:25:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-06-01 20:25:40,335 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-06-01 20:25:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:40,335 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-06-01 20:25:40,335 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) [2021-06-01 20:25:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-06-01 20:25:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 20:25:40,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:40,338 INFO L554 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] [2021-06-01 20:25:40,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-01 20:25:40,553 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-01 20:25:40,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:40,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449758834] [2021-06-01 20:25:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:40,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449758834] [2021-06-01 20:25:40,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449758834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386076330] [2021-06-01 20:25:40,606 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 [2021-06-01 20:25:40,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:25:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-01 20:25:40,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:40,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386076330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:40,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:40,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-01 20:25:40,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854942573] [2021-06-01 20:25:40,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 20:25:40,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:40,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 20:25:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-01 20:25:40,711 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) [2021-06-01 20:25:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:40,798 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-06-01 20:25:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 20:25:40,798 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 [2021-06-01 20:25:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:40,802 INFO L225 Difference]: With dead ends: 2387 [2021-06-01 20:25:40,802 INFO L226 Difference]: Without dead ends: 2337 [2021-06-01 20:25:40,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-01 20:25:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-01 20:25:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-06-01 20:25:40,828 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) [2021-06-01 20:25:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-06-01 20:25:40,832 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-06-01 20:25:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:40,832 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-06-01 20:25:40,832 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) [2021-06-01 20:25:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-06-01 20:25:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-01 20:25:40,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:40,836 INFO L554 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] [2021-06-01 20:25:41,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:25:41,057 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-01 20:25:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:41,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753846465] [2021-06-01 20:25:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-01 20:25:41,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:41,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753846465] [2021-06-01 20:25:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753846465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:41,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344943048] [2021-06-01 20:25:41,099 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 [2021-06-01 20:25:41,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 20:25:41,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 20:25:41,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-01 20:25:41,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344943048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:41,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:41,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 20:25:41,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136539849] [2021-06-01 20:25:41,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 20:25:41,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:41,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 20:25:41,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-01 20:25:41,203 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) [2021-06-01 20:25:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:41,222 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-06-01 20:25:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 20:25:41,223 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 [2021-06-01 20:25:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:41,226 INFO L225 Difference]: With dead ends: 2477 [2021-06-01 20:25:41,226 INFO L226 Difference]: Without dead ends: 2477 [2021-06-01 20:25:41,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-01 20:25:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-01 20:25:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-06-01 20:25:41,250 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) [2021-06-01 20:25:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-06-01 20:25:41,253 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-06-01 20:25:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:41,254 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-06-01 20:25:41,254 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) [2021-06-01 20:25:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-06-01 20:25:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-01 20:25:41,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:41,257 INFO L554 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] [2021-06-01 20:25:41,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:25:41,480 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-01 20:25:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:41,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635800984] [2021-06-01 20:25:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-01 20:25:41,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:41,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635800984] [2021-06-01 20:25:41,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635800984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:41,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750685979] [2021-06-01 20:25:41,519 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 [2021-06-01 20:25:41,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 20:25:41,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 20:25:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 20:25:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750685979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:41,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:41,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 20:25:41,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175652722] [2021-06-01 20:25:41,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 20:25:41,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 20:25:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-01 20:25:41,603 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) [2021-06-01 20:25:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:41,629 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-06-01 20:25:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 20:25:41,629 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 [2021-06-01 20:25:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:41,632 INFO L225 Difference]: With dead ends: 1749 [2021-06-01 20:25:41,632 INFO L226 Difference]: Without dead ends: 1749 [2021-06-01 20:25:41,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-01 20:25:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-06-01 20:25:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-06-01 20:25:41,660 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) [2021-06-01 20:25:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-06-01 20:25:41,663 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-06-01 20:25:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:41,663 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-06-01 20:25:41,663 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) [2021-06-01 20:25:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-06-01 20:25:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-01 20:25:41,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:41,666 INFO L554 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] [2021-06-01 20:25:41,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-01 20:25:41,889 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-01 20:25:41,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:41,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583580712] [2021-06-01 20:25:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:42,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:42,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583580712] [2021-06-01 20:25:42,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583580712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:42,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117004330] [2021-06-01 20:25:42,490 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 [2021-06-01 20:25:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:42,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-01 20:25:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:43,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:43,085 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 [2021-06-01 20:25:43,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:43,169 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-06-01 20:25:43,195 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. [2021-06-01 20:25:43,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-06-01 20:25:43,687 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-01 20:25:43,687 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 [2021-06-01 20:25:43,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:43,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:43,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:43,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-01 20:25:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:43,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117004330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:43,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:43,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-01 20:25:43,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669655766] [2021-06-01 20:25:43,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-01 20:25:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-01 20:25:43,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-01 20:25:43,701 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) [2021-06-01 20:25:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:47,232 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-06-01 20:25:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:25:47,233 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 [2021-06-01 20:25:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:47,238 INFO L225 Difference]: With dead ends: 2993 [2021-06-01 20:25:47,238 INFO L226 Difference]: Without dead ends: 2897 [2021-06-01 20:25:47,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2630.0ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-01 20:25:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-01 20:25:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-06-01 20:25:47,261 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) [2021-06-01 20:25:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-06-01 20:25:47,264 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-06-01 20:25:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:47,264 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-06-01 20:25:47,264 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) [2021-06-01 20:25:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-06-01 20:25:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-01 20:25:47,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:47,268 INFO L554 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] [2021-06-01 20:25:47,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:25:47,490 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-01 20:25:47,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:47,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477170437] [2021-06-01 20:25:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:25:47,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:47,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477170437] [2021-06-01 20:25:47,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477170437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:47,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214267974] [2021-06-01 20:25:47,977 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 [2021-06-01 20:25:48,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:25:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-01 20:25:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:49,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:49,082 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 [2021-06-01 20:25:49,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:49,166 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-01 20:25:49,182 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. [2021-06-01 20:25:49,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-01 20:25:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:49,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:49,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:49,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:49,632 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 [2021-06-01 20:25:49,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:49,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:49,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:25:49,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:25:49,644 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 [2021-06-01 20:25:49,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:49,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:49,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 20:25:49,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-01 20:25:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:49,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214267974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:49,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:25:49,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-01 20:25:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787775823] [2021-06-01 20:25:49,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-01 20:25:49,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:25:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-01 20:25:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-01 20:25:49,664 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) [2021-06-01 20:25:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:25:54,917 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-06-01 20:25:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-01 20:25:54,918 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 [2021-06-01 20:25:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:25:54,920 INFO L225 Difference]: With dead ends: 3235 [2021-06-01 20:25:54,920 INFO L226 Difference]: Without dead ends: 3122 [2021-06-01 20:25:54,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4160.3ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-01 20:25:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-06-01 20:25:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-06-01 20:25:54,942 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) [2021-06-01 20:25:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-06-01 20:25:54,944 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-06-01 20:25:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:25:54,944 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-06-01 20:25:54,945 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) [2021-06-01 20:25:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-06-01 20:25:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-01 20:25:54,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:25:54,961 INFO L554 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] [2021-06-01 20:25:55,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-01 20:25:55,174 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:25:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:25:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-01 20:25:55,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:25:55,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894820277] [2021-06-01 20:25:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:25:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:25:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:25:55,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:25:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894820277] [2021-06-01 20:25:55,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894820277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:25:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385581839] [2021-06-01 20:25:55,676 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 [2021-06-01 20:25:55,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 20:25:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:25:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:25:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:25:57,647 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-01 20:25:57,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:57,783 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 [2021-06-01 20:25:57,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:57,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:25:57,823 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 [2021-06-01 20:25:57,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-01 20:25:58,045 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-06-01 20:25:58,045 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-06-01 20:25:58,128 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. [2021-06-01 20:25:58,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-06-01 20:26:05,448 WARN L205 SmtUtils]: Spent 4.82 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-01 20:26:38,116 WARN L205 SmtUtils]: Spent 12.92 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-01 20:26:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:26:38,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:26:38,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:26:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:26:38,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 20:26:38,466 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-01 20:26:38,466 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-01 20:26:38,466 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 [2021-06-01 20:26:38,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 20:26:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:26:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:26:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-01 20:26:38,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 20:26:38,808 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 [2021-06-01 20:26:39,535 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 224 [2021-06-01 20:26:39,684 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-01 20:26:39,788 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-01 20:26:39,945 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-06-01 20:26:40,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-01 20:26:40,972 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-06-01 20:26:40,972 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-06-01 20:26:40,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-01 20:26:40,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-06-01 20:26:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:26:41,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385581839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:26:41,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:26:41,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-01 20:26:41,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665846828] [2021-06-01 20:26:41,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-01 20:26:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:26:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-01 20:26:41,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2267, Unknown=4, NotChecked=0, Total=2550 [2021-06-01 20:26:41,137 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) [2021-06-01 20:26:59,616 WARN L205 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-06-01 20:27:08,823 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-06-01 20:27:31,890 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-01 20:27:42,981 WARN L205 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-01 20:27:53,719 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-01 20:28:00,805 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-06-01 20:28:20,473 WARN L205 SmtUtils]: Spent 13.05 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-06-01 20:28:35,678 WARN L205 SmtUtils]: Spent 13.31 s on a formula simplification. DAG size of input: 120 DAG size of output: 70 [2021-06-01 20:28:50,730 WARN L205 SmtUtils]: Spent 10.99 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-01 20:29:16,107 WARN L205 SmtUtils]: Spent 13.53 s on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-06-01 20:29:20,995 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-06-01 20:29:24,806 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-06-01 20:29:39,575 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-06-01 20:29:44,252 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-06-01 20:29:51,393 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-06-01 20:30:12,971 WARN L205 SmtUtils]: Spent 15.13 s on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2021-06-01 20:30:30,888 WARN L205 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-01 20:30:38,832 WARN L205 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-06-01 20:31:03,228 WARN L205 SmtUtils]: Spent 14.64 s on a formula simplification. DAG size of input: 121 DAG size of output: 48 [2021-06-01 20:31:11,478 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-01 20:31:25,386 WARN L205 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-06-01 20:31:38,983 WARN L205 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-01 20:31:53,918 WARN L205 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-06-01 20:32:02,718 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-06-01 20:32:20,086 WARN L205 SmtUtils]: Spent 7.72 s on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2021-06-01 20:32:36,397 WARN L205 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2021-06-01 20:32:51,718 WARN L205 SmtUtils]: Spent 14.53 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-06-01 20:33:06,871 WARN L205 SmtUtils]: Spent 6.57 s on a formula simplification. DAG size of input: 126 DAG size of output: 51 [2021-06-01 20:33:26,203 WARN L205 SmtUtils]: Spent 11.41 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-01 20:33:59,385 WARN L205 SmtUtils]: Spent 12.80 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-06-01 20:34:10,662 WARN L205 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-01 20:34:23,235 WARN L205 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-06-01 20:35:05,186 WARN L205 SmtUtils]: Spent 14.80 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-06-01 20:35:34,193 WARN L205 SmtUtils]: Spent 12.72 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-06-01 20:35:54,659 WARN L205 SmtUtils]: Spent 8.57 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-01 20:36:09,443 WARN L205 SmtUtils]: Spent 6.51 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-01 20:36:26,517 WARN L205 SmtUtils]: Spent 11.63 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-01 20:37:10,663 WARN L205 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-06-01 20:37:27,968 WARN L205 SmtUtils]: Spent 10.83 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-06-01 20:37:39,167 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-01 20:37:46,699 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-06-01 20:38:04,767 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-06-01 20:38:32,750 WARN L205 SmtUtils]: Spent 13.52 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-06-01 20:39:02,108 WARN L205 SmtUtils]: Spent 11.91 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 Received shutdown request... [2021-06-01 20:39:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-01 20:39:14,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:39:14,211 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-01 20:39:14,213 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 20:39:14,214 WARN L196 ceAbstractionStarter]: Timeout [2021-06-01 20:39:14,214 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 08:39:14 BasicIcfg [2021-06-01 20:39:14,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 20:39:14,215 INFO L168 Benchmark]: Toolchain (without parser) took 869891.42 ms. Allocated memory was 369.1 MB in the beginning and 559.9 MB in the end (delta: 190.8 MB). Free memory was 349.1 MB in the beginning and 475.4 MB in the end (delta: -126.3 MB). Peak memory consumption was 68.1 MB. Max. memory is 16.0 GB. [2021-06-01 20:39:14,215 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory is still 350.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 20:39:14,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.24 ms. Allocated memory is still 369.1 MB. Free memory was 349.1 MB in the beginning and 347.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-01 20:39:14,215 INFO L168 Benchmark]: Boogie Preprocessor took 18.79 ms. Allocated memory is still 369.1 MB. Free memory was 347.6 MB in the beginning and 346.6 MB in the end (delta: 950.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 20:39:14,215 INFO L168 Benchmark]: RCFGBuilder took 231.84 ms. Allocated memory is still 369.1 MB. Free memory was 346.6 MB in the beginning and 333.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-01 20:39:14,215 INFO L168 Benchmark]: TraceAbstraction took 869606.65 ms. Allocated memory was 369.1 MB in the beginning and 559.9 MB in the end (delta: 190.8 MB). Free memory was 333.2 MB in the beginning and 475.4 MB in the end (delta: -142.2 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.0 GB. [2021-06-01 20:39:14,215 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 369.1 MB. Free memory is still 350.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.24 ms. Allocated memory is still 369.1 MB. Free memory was 349.1 MB in the beginning and 347.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.79 ms. Allocated memory is still 369.1 MB. Free memory was 347.6 MB in the beginning and 346.6 MB in the end (delta: 950.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 231.84 ms. Allocated memory is still 369.1 MB. Free memory was 346.6 MB in the beginning and 333.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 869606.65 ms. Allocated memory was 369.1 MB in the beginning and 559.9 MB in the end (delta: 190.8 MB). Free memory was 333.2 MB in the beginning and 475.4 MB in the end (delta: -142.2 MB). Peak memory consumption was 51.3 MB. Max. memory is 16.0 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 111 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 149 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: 869534.9ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 66.4ms, AutomataDifference: 798513.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 69.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1083 SDtfs, 5045 SDslu, 11538 SDs, 0 SdLazy, 28954 SolverSat, 3260 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 87870.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1844 GetRequests, 588 SyntacticMatches, 39 SemanticMatches, 1216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40833 ImplicationChecksByTransitivity, 746443.0ms 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: 544.6ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 126.7ms SsaConstructionTime, 476.0ms SatisfiabilityAnalysisTime, 64579.0ms 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