/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/figure1-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:23:07,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:23:07,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:23:07,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 15:23:07,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 15:23:07,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 15:23:07,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 15:23:07,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 15:23:07,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 15:23:07,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 15:23:07,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 15:23:07,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 15:23:07,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 15:23:07,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 15:23:07,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 15:23:08,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 15:23:08,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 15:23:08,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 15:23:08,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 15:23:08,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 15:23:08,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 15:23:08,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 15:23:08,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 15:23:08,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 15:23:08,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 15:23:08,023 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 [2021-05-03 15:23:08,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:23:08,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:23:08,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:23:08,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:23:08,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:23:08,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:23:08,055 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:23:08,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:23:08,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:23:08,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:23:08,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:23:08,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:23:08,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:23:08,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:23:08,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:23:08,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:23:08,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:23:08,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:23:08,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:23:08,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:23:08,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:23:08,322 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:23:08,323 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:23:08,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl [2021-05-03 15:23:08,324 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl' [2021-05-03 15:23:08,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:23:08,350 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:23:08,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:23:08,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:23:08,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:23:08,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:23:08,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:23:08,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:23:08,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:23:08,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/1) ... [2021-05-03 15:23:08,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:23:08,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:23:08,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:23:08,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:23:08,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (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 [2021-05-03 15:23:08,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:23:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:23:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:23:08,449 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:23:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:23:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:23:08,449 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:23:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:23:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:23:08,450 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:23:08,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:23:08,574 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 15:23:08,575 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:23:08 BoogieIcfgContainer [2021-05-03 15:23:08,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:23:08,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:23:08,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:23:08,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:23:08,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:08" (1/2) ... [2021-05-03 15:23:08,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43668de3 and model type figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:23:08, skipping insertion in model container [2021-05-03 15:23:08,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:23:08" (2/2) ... [2021-05-03 15:23:08,580 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.bpl [2021-05-03 15:23:08,583 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:23:08,584 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:23:08,597 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:23:08,598 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:23:08,628 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 15:23:08,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 15:23:08,661 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:23:08,662 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:23:08,662 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:23:08,662 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:23:08,662 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:23:08,662 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:23:08,662 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:23:08,662 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:23:08,668 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-03 15:23:08,683 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-05-03 15:23:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-05-03 15:23:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 15:23:08,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:08,689 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:08,689 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1829606569, now seen corresponding path program 1 times [2021-05-03 15:23:08,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:08,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475846692] [2021-05-03 15:23:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:08,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475846692] [2021-05-03 15:23:08,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:08,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 15:23:08,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891236597] [2021-05-03 15:23:08,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:23:08,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:23:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:23:08,887 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:09,052 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2021-05-03 15:23:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:23:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 15:23:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:09,061 INFO L225 Difference]: With dead ends: 67 [2021-05-03 15:23:09,061 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 15:23:09,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:23:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 15:23:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-05-03 15:23:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 69 transitions. [2021-05-03 15:23:09,095 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 69 transitions. Word has length 15 [2021-05-03 15:23:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:09,095 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 69 transitions. [2021-05-03 15:23:09,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 69 transitions. [2021-05-03 15:23:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 15:23:09,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:09,097 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:09,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:23:09,097 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1179537599, now seen corresponding path program 2 times [2021-05-03 15:23:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:09,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677833783] [2021-05-03 15:23:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:09,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677833783] [2021-05-03 15:23:09,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 15:23:09,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037990659] [2021-05-03 15:23:09,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:23:09,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:23:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:23:09,220 INFO L87 Difference]: Start difference. First operand 39 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:09,348 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-05-03 15:23:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:23:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 15:23:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:09,349 INFO L225 Difference]: With dead ends: 50 [2021-05-03 15:23:09,349 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 15:23:09,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:23:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 15:23:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-03 15:23:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-05-03 15:23:09,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-05-03 15:23:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:09,359 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-05-03 15:23:09,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-05-03 15:23:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:23:09,360 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:09,360 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:09,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 15:23:09,360 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1059156761, now seen corresponding path program 1 times [2021-05-03 15:23:09,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:09,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768418670] [2021-05-03 15:23:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:09,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768418670] [2021-05-03 15:23:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809640180] [2021-05-03 15:23:09,482 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) [2021-05-03 15:23:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:09,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:09,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:09,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:23:09,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416260877] [2021-05-03 15:23:09,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:23:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:23:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:23:09,751 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:09,987 INFO L93 Difference]: Finished difference Result 107 states and 185 transitions. [2021-05-03 15:23:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:23:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-05-03 15:23:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:09,988 INFO L225 Difference]: With dead ends: 107 [2021-05-03 15:23:09,988 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 15:23:09,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:23:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 15:23:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-05-03 15:23:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-05-03 15:23:09,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-05-03 15:23:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:09,993 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-05-03 15:23:09,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-05-03 15:23:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:23:09,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:09,994 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:10,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 15:23:10,211 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1709225731, now seen corresponding path program 2 times [2021-05-03 15:23:10,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:10,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229094840] [2021-05-03 15:23:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:10,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229094840] [2021-05-03 15:23:10,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928849767] [2021-05-03 15:23:10,358 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 [2021-05-03 15:23:10,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:10,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:10,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:10,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:10,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:23:10,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254870611] [2021-05-03 15:23:10,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:23:10,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:10,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:23:10,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:23:10,546 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:10,907 INFO L93 Difference]: Finished difference Result 117 states and 198 transitions. [2021-05-03 15:23:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:23:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-05-03 15:23:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:10,908 INFO L225 Difference]: With dead ends: 117 [2021-05-03 15:23:10,908 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 15:23:10,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:23:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 15:23:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2021-05-03 15:23:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-05-03 15:23:10,912 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-05-03 15:23:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:10,912 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-05-03 15:23:10,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-05-03 15:23:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:23:10,913 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:10,913 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:11,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:11,117 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash -351634071, now seen corresponding path program 3 times [2021-05-03 15:23:11,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:11,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349011656] [2021-05-03 15:23:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349011656] [2021-05-03 15:23:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465840771] [2021-05-03 15:23:11,209 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 [2021-05-03 15:23:11,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:23:11,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:11,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:11,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:11,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:11,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:23:11,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059832312] [2021-05-03 15:23:11,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:23:11,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:23:11,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:23:11,432 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:11,686 INFO L93 Difference]: Finished difference Result 94 states and 156 transitions. [2021-05-03 15:23:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:23:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-05-03 15:23:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:11,687 INFO L225 Difference]: With dead ends: 94 [2021-05-03 15:23:11,687 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 15:23:11,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:23:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 15:23:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-05-03 15:23:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2021-05-03 15:23:11,691 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 17 [2021-05-03 15:23:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:11,691 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2021-05-03 15:23:11,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2021-05-03 15:23:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:23:11,691 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:11,691 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:11,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:11,907 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash -886863873, now seen corresponding path program 4 times [2021-05-03 15:23:11,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:11,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706280224] [2021-05-03 15:23:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:12,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706280224] [2021-05-03 15:23:12,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235805203] [2021-05-03 15:23:12,005 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 [2021-05-03 15:23:12,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:12,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:12,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:23:12,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433554099] [2021-05-03 15:23:12,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:23:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:23:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:23:12,179 INFO L87 Difference]: Start difference. First operand 52 states and 93 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:12,403 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2021-05-03 15:23:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:23:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-05-03 15:23:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:12,404 INFO L225 Difference]: With dead ends: 87 [2021-05-03 15:23:12,404 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 15:23:12,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:23:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 15:23:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-05-03 15:23:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 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) [2021-05-03 15:23:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-05-03 15:23:12,407 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-05-03 15:23:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:12,407 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-05-03 15:23:12,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2021-05-03 15:23:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-05-03 15:23:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:12,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:12,407 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:12,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:12,623 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash -980318313, now seen corresponding path program 1 times [2021-05-03 15:23:12,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:12,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282316742] [2021-05-03 15:23:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282316742] [2021-05-03 15:23:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682374801] [2021-05-03 15:23:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 15:23:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:23:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:12,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:12,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754845998] [2021-05-03 15:23:12,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:12,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:12,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:12,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:12,900 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:13,125 INFO L93 Difference]: Finished difference Result 113 states and 197 transitions. [2021-05-03 15:23:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:23:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:13,126 INFO L225 Difference]: With dead ends: 113 [2021-05-03 15:23:13,126 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 15:23:13,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:23:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 15:23:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-05-03 15:23:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-05-03 15:23:13,129 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 19 [2021-05-03 15:23:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:13,129 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-05-03 15:23:13,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-05-03 15:23:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:13,130 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:13,130 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:13,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-03 15:23:13,347 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2049721123, now seen corresponding path program 2 times [2021-05-03 15:23:13,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:13,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274392836] [2021-05-03 15:23:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:13,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274392836] [2021-05-03 15:23:13,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190633269] [2021-05-03 15:23:13,431 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 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 [2021-05-03 15:23:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 15:23:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:13,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:13,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:13,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611832930] [2021-05-03 15:23:13,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:13,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:13,684 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:13,988 INFO L93 Difference]: Finished difference Result 120 states and 202 transitions. [2021-05-03 15:23:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:23:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:13,989 INFO L225 Difference]: With dead ends: 120 [2021-05-03 15:23:13,989 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 15:23:13,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:23:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 15:23:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-05-03 15:23:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2021-05-03 15:23:13,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 19 [2021-05-03 15:23:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:13,992 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2021-05-03 15:23:13,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2021-05-03 15:23:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:13,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:13,993 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:14,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:14,210 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1109060901, now seen corresponding path program 3 times [2021-05-03 15:23:14,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:14,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580319147] [2021-05-03 15:23:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:14,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580319147] [2021-05-03 15:23:14,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414218628] [2021-05-03 15:23:14,308 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 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 [2021-05-03 15:23:14,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:23:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:23:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:14,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:14,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:14,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540198145] [2021-05-03 15:23:14,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:14,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:14,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:14,499 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:14,840 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-05-03 15:23:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:23:14,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:14,843 INFO L225 Difference]: With dead ends: 130 [2021-05-03 15:23:14,843 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 15:23:14,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:23:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 15:23:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2021-05-03 15:23:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 120 transitions. [2021-05-03 15:23:14,850 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 120 transitions. Word has length 19 [2021-05-03 15:23:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:14,852 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 120 transitions. [2021-05-03 15:23:14,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 120 transitions. [2021-05-03 15:23:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:14,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:14,853 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:15,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:15,068 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash -458991931, now seen corresponding path program 4 times [2021-05-03 15:23:15,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:15,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36259650] [2021-05-03 15:23:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:15,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36259650] [2021-05-03 15:23:15,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865052099] [2021-05-03 15:23:15,164 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 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 [2021-05-03 15:23:15,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:15,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:23:15,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:15,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:15,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43272864] [2021-05-03 15:23:15,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:15,374 INFO L87 Difference]: Start difference. First operand 65 states and 120 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:15,670 INFO L93 Difference]: Finished difference Result 106 states and 184 transitions. [2021-05-03 15:23:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:23:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:15,671 INFO L225 Difference]: With dead ends: 106 [2021-05-03 15:23:15,671 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 15:23:15,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:23:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 15:23:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-05-03 15:23:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2021-05-03 15:23:15,674 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 19 [2021-05-03 15:23:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:15,675 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2021-05-03 15:23:15,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2021-05-03 15:23:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:15,675 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:15,675 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:15,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:23:15,892 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2036952865, now seen corresponding path program 5 times [2021-05-03 15:23:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:15,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560398660] [2021-05-03 15:23:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:15,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560398660] [2021-05-03 15:23:15,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616253042] [2021-05-03 15:23:15,972 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 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 [2021-05-03 15:23:16,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:23:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:23:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:16,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:16,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:16,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805718449] [2021-05-03 15:23:16,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:16,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:16,216 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:16,383 INFO L93 Difference]: Finished difference Result 95 states and 164 transitions. [2021-05-03 15:23:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:23:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:16,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:16,384 INFO L225 Difference]: With dead ends: 95 [2021-05-03 15:23:16,384 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 15:23:16,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:23:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 15:23:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-05-03 15:23:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2021-05-03 15:23:16,387 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 19 [2021-05-03 15:23:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:16,387 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2021-05-03 15:23:16,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2021-05-03 15:23:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:16,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:16,387 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:16,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:16,593 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -900767593, now seen corresponding path program 6 times [2021-05-03 15:23:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:16,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301272650] [2021-05-03 15:23:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:16,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301272650] [2021-05-03 15:23:16,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456138836] [2021-05-03 15:23:16,695 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 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 [2021-05-03 15:23:16,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:23:16,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 15:23:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:16,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:16,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:16,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196687064] [2021-05-03 15:23:16,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:16,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:16,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:16,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:16,888 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:16,989 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2021-05-03 15:23:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:23:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:16,991 INFO L225 Difference]: With dead ends: 86 [2021-05-03 15:23:16,991 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 15:23:16,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 15:23:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-05-03 15:23:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 58 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2021-05-03 15:23:16,998 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 19 [2021-05-03 15:23:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:16,998 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2021-05-03 15:23:16,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2021-05-03 15:23:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:23:17,000 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:17,000 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:17,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:17,209 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -250698623, now seen corresponding path program 7 times [2021-05-03 15:23:17,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:17,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570596354] [2021-05-03 15:23:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:17,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570596354] [2021-05-03 15:23:17,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798146155] [2021-05-03 15:23:17,295 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 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 [2021-05-03 15:23:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:23:17,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:17,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:17,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:23:17,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956247070] [2021-05-03 15:23:17,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:23:17,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:23:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:23:17,488 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:17,590 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-05-03 15:23:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:23:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 15:23:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:17,591 INFO L225 Difference]: With dead ends: 74 [2021-05-03 15:23:17,591 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 15:23:17,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 15:23:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-05-03 15:23:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 100 transitions. [2021-05-03 15:23:17,594 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 100 transitions. Word has length 19 [2021-05-03 15:23:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:17,594 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 100 transitions. [2021-05-03 15:23:17,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 100 transitions. [2021-05-03 15:23:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:17,595 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:17,595 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:17,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 15:23:17,801 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 798154329, now seen corresponding path program 8 times [2021-05-03 15:23:17,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:17,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644042183] [2021-05-03 15:23:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:17,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644042183] [2021-05-03 15:23:17,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797871933] [2021-05-03 15:23:17,879 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 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 [2021-05-03 15:23:17,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:18,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:18,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 15:23:18,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117262910] [2021-05-03 15:23:18,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:23:18,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:18,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:23:18,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:23:18,074 INFO L87 Difference]: Start difference. First operand 56 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:18,612 INFO L93 Difference]: Finished difference Result 107 states and 190 transitions. [2021-05-03 15:23:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:23:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:18,613 INFO L225 Difference]: With dead ends: 107 [2021-05-03 15:23:18,613 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 15:23:18,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:23:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 15:23:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-05-03 15:23:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 87 transitions. [2021-05-03 15:23:18,615 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 87 transitions. Word has length 21 [2021-05-03 15:23:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:18,615 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 87 transitions. [2021-05-03 15:23:18,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 87 transitions. [2021-05-03 15:23:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:18,616 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:18,616 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:18,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 15:23:18,823 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:18,824 INFO L82 PathProgramCache]: Analyzing trace with hash -466773531, now seen corresponding path program 9 times [2021-05-03 15:23:18,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:18,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610089598] [2021-05-03 15:23:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:18,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610089598] [2021-05-03 15:23:18,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23459758] [2021-05-03 15:23:18,905 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:23:18,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:23:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:19,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:19,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 15:23:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650246922] [2021-05-03 15:23:19,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:23:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:23:19,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:23:19,110 INFO L87 Difference]: Start difference. First operand 51 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:19,741 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-05-03 15:23:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:23:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:19,742 INFO L225 Difference]: With dead ends: 85 [2021-05-03 15:23:19,742 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 15:23:19,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:23:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 15:23:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-05-03 15:23:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 81 transitions. [2021-05-03 15:23:19,744 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 81 transitions. Word has length 21 [2021-05-03 15:23:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:19,744 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 81 transitions. [2021-05-03 15:23:19,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 81 transitions. [2021-05-03 15:23:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:19,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:19,745 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:19,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:23:19,958 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash 669411741, now seen corresponding path program 10 times [2021-05-03 15:23:19,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:19,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956064741] [2021-05-03 15:23:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:20,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956064741] [2021-05-03 15:23:20,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663334372] [2021-05-03 15:23:20,043 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 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 [2021-05-03 15:23:20,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:20,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:20,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:20,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 15:23:20,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632757637] [2021-05-03 15:23:20,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:23:20,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:20,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:23:20,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:23:20,237 INFO L87 Difference]: Start difference. First operand 48 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:21,069 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-05-03 15:23:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:23:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:21,069 INFO L225 Difference]: With dead ends: 90 [2021-05-03 15:23:21,069 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 15:23:21,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 842.1ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:23:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 15:23:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-05-03 15:23:21,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-05-03 15:23:21,071 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-05-03 15:23:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:21,071 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-05-03 15:23:21,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-05-03 15:23:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:21,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:21,072 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:21,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:21,285 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1319480711, now seen corresponding path program 11 times [2021-05-03 15:23:21,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:21,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459475737] [2021-05-03 15:23:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:21,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459475737] [2021-05-03 15:23:21,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36609717] [2021-05-03 15:23:21,371 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 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 [2021-05-03 15:23:21,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:23:21,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:21,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:21,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:21,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 15:23:21,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880785787] [2021-05-03 15:23:21,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:23:21,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:21,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:23:21,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:23:21,581 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:22,405 INFO L93 Difference]: Finished difference Result 79 states and 133 transitions. [2021-05-03 15:23:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:23:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:22,406 INFO L225 Difference]: With dead ends: 79 [2021-05-03 15:23:22,406 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 15:23:22,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:23:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 15:23:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-05-03 15:23:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-05-03 15:23:22,408 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-05-03 15:23:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:22,408 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-05-03 15:23:22,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-05-03 15:23:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:22,408 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:22,408 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:22,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:23:22,617 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1793458263, now seen corresponding path program 12 times [2021-05-03 15:23:22,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:22,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372696136] [2021-05-03 15:23:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:22,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372696136] [2021-05-03 15:23:22,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534134390] [2021-05-03 15:23:22,709 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 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 [2021-05-03 15:23:22,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:23:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:23:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:22,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:22,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:22,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834993266] [2021-05-03 15:23:22,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:22,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:22,933 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:23,347 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2021-05-03 15:23:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:23:23,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:23,357 INFO L225 Difference]: With dead ends: 107 [2021-05-03 15:23:23,357 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 15:23:23,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:23:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 15:23:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2021-05-03 15:23:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 87 transitions. [2021-05-03 15:23:23,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 87 transitions. Word has length 21 [2021-05-03 15:23:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:23,359 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 87 transitions. [2021-05-03 15:23:23,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 87 transitions. [2021-05-03 15:23:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:23,360 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:23,360 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:23,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 15:23:23,566 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1615710753, now seen corresponding path program 13 times [2021-05-03 15:23:23,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:23,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468709661] [2021-05-03 15:23:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468709661] [2021-05-03 15:23:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017501718] [2021-05-03 15:23:23,647 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 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 [2021-05-03 15:23:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:23,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:23,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:23,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687257610] [2021-05-03 15:23:23,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:23,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:23,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:23,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:23,859 INFO L87 Difference]: Start difference. First operand 49 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:24,232 INFO L93 Difference]: Finished difference Result 114 states and 189 transitions. [2021-05-03 15:23:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:23:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:24,233 INFO L225 Difference]: With dead ends: 114 [2021-05-03 15:23:24,233 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 15:23:24,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:23:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 15:23:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2021-05-03 15:23:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2021-05-03 15:23:24,235 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 21 [2021-05-03 15:23:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:24,235 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2021-05-03 15:23:24,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2021-05-03 15:23:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:24,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:24,236 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:24,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:24,445 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash 603018221, now seen corresponding path program 14 times [2021-05-03 15:23:24,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:24,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299793071] [2021-05-03 15:23:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:24,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299793071] [2021-05-03 15:23:24,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828602146] [2021-05-03 15:23:24,536 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 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 [2021-05-03 15:23:24,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:24,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:24,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:23:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:24,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:24,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:24,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590947749] [2021-05-03 15:23:24,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:24,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:24,753 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:25,343 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-05-03 15:23:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:23:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:25,345 INFO L225 Difference]: With dead ends: 182 [2021-05-03 15:23:25,345 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 15:23:25,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:23:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 15:23:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-05-03 15:23:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-05-03 15:23:25,347 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 21 [2021-05-03 15:23:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:25,347 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-05-03 15:23:25,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-05-03 15:23:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:25,348 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:25,348 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:25,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:25,559 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash 67788419, now seen corresponding path program 15 times [2021-05-03 15:23:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:25,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80225150] [2021-05-03 15:23:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:25,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80225150] [2021-05-03 15:23:25,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532782330] [2021-05-03 15:23:25,658 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 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 [2021-05-03 15:23:25,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:23:25,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:25,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:25,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:25,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:25,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205304195] [2021-05-03 15:23:25,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:25,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:25,866 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:26,391 INFO L93 Difference]: Finished difference Result 143 states and 238 transitions. [2021-05-03 15:23:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:23:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:26,392 INFO L225 Difference]: With dead ends: 143 [2021-05-03 15:23:26,392 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 15:23:26,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:23:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 15:23:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2021-05-03 15:23:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 83 transitions. [2021-05-03 15:23:26,394 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 83 transitions. Word has length 21 [2021-05-03 15:23:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:26,394 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 83 transitions. [2021-05-03 15:23:26,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 83 transitions. [2021-05-03 15:23:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:26,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:26,395 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:26,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:26,615 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:26,615 INFO L82 PathProgramCache]: Analyzing trace with hash 770739301, now seen corresponding path program 16 times [2021-05-03 15:23:26,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:26,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344957047] [2021-05-03 15:23:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:26,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344957047] [2021-05-03 15:23:26,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916880551] [2021-05-03 15:23:26,700 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:23:26,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:26,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:26,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:23:26,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:26,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:26,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:26,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816379324] [2021-05-03 15:23:26,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:26,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:26,938 INFO L87 Difference]: Start difference. First operand 47 states and 83 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:27,273 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-05-03 15:23:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:23:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:27,274 INFO L225 Difference]: With dead ends: 97 [2021-05-03 15:23:27,274 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 15:23:27,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:23:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 15:23:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-05-03 15:23:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 62 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2021-05-03 15:23:27,276 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 21 [2021-05-03 15:23:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:27,276 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2021-05-03 15:23:27,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2021-05-03 15:23:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:27,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:27,277 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:27,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 15:23:27,481 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash -241953231, now seen corresponding path program 17 times [2021-05-03 15:23:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:27,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946308189] [2021-05-03 15:23:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:27,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946308189] [2021-05-03 15:23:27,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975148357] [2021-05-03 15:23:27,582 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:23:27,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:23:27,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:27,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:27,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167829006] [2021-05-03 15:23:27,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:27,807 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:28,313 INFO L93 Difference]: Finished difference Result 133 states and 227 transitions. [2021-05-03 15:23:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:23:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:28,314 INFO L225 Difference]: With dead ends: 133 [2021-05-03 15:23:28,314 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 15:23:28,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 554.3ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:23:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 15:23:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-05-03 15:23:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-05-03 15:23:28,316 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 21 [2021-05-03 15:23:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:28,316 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-05-03 15:23:28,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-05-03 15:23:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:23:28,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:28,316 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:28,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:23:28,531 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -777183033, now seen corresponding path program 18 times [2021-05-03 15:23:28,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:28,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398918477] [2021-05-03 15:23:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398918477] [2021-05-03 15:23:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029107177] [2021-05-03 15:23:28,637 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:28,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:23:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:23:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:28,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:28,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:23:28,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311801134] [2021-05-03 15:23:28,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:28,867 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:29,291 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-05-03 15:23:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:23:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:23:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:29,292 INFO L225 Difference]: With dead ends: 111 [2021-05-03 15:23:29,292 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 15:23:29,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:23:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 15:23:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-05-03 15:23:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 99 transitions. [2021-05-03 15:23:29,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 99 transitions. Word has length 21 [2021-05-03 15:23:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:29,293 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 99 transitions. [2021-05-03 15:23:29,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 99 transitions. [2021-05-03 15:23:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:23:29,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:29,294 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:29,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:29,505 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2078233109, now seen corresponding path program 19 times [2021-05-03 15:23:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:29,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644602127] [2021-05-03 15:23:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:23:29,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644602127] [2021-05-03 15:23:29,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260038033] [2021-05-03 15:23:29,576 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:29,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:23:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:29,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:29,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 15:23:29,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104412997] [2021-05-03 15:23:29,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:29,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:29,814 INFO L87 Difference]: Start difference. First operand 57 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:30,316 INFO L93 Difference]: Finished difference Result 109 states and 188 transitions. [2021-05-03 15:23:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:23:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-05-03 15:23:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:30,317 INFO L225 Difference]: With dead ends: 109 [2021-05-03 15:23:30,317 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 15:23:30,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 558.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:23:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 15:23:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2021-05-03 15:23:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 60 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2021-05-03 15:23:30,319 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 23 [2021-05-03 15:23:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:30,319 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2021-05-03 15:23:30,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2021-05-03 15:23:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:23:30,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:30,320 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:30,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 15:23:30,525 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1330935907, now seen corresponding path program 20 times [2021-05-03 15:23:30,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:30,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973956430] [2021-05-03 15:23:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973956430] [2021-05-03 15:23:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130916529] [2021-05-03 15:23:30,606 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:30,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:30,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:30,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:23:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:30,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:30,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 15:23:30,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710848510] [2021-05-03 15:23:30,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:30,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:30,824 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:31,347 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2021-05-03 15:23:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:23:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-05-03 15:23:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:31,348 INFO L225 Difference]: With dead ends: 120 [2021-05-03 15:23:31,348 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 15:23:31,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:23:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 15:23:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2021-05-03 15:23:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 108 transitions. [2021-05-03 15:23:31,351 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 108 transitions. Word has length 23 [2021-05-03 15:23:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 108 transitions. [2021-05-03 15:23:31,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 108 transitions. [2021-05-03 15:23:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:23:31,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:31,352 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:31,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:31,566 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash 318243375, now seen corresponding path program 21 times [2021-05-03 15:23:31,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:31,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467632893] [2021-05-03 15:23:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:31,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467632893] [2021-05-03 15:23:31,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7935612] [2021-05-03 15:23:31,651 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:31,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:23:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:31,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:23:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:31,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:31,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 15:23:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745455388] [2021-05-03 15:23:31,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:31,874 INFO L87 Difference]: Start difference. First operand 61 states and 108 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:32,612 INFO L93 Difference]: Finished difference Result 116 states and 202 transitions. [2021-05-03 15:23:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:23:32,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-05-03 15:23:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:32,613 INFO L225 Difference]: With dead ends: 116 [2021-05-03 15:23:32,613 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 15:23:32,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:23:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 15:23:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-05-03 15:23:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-05-03 15:23:32,615 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 23 [2021-05-03 15:23:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:32,615 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-05-03 15:23:32,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-05-03 15:23:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:23:32,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:32,615 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:32,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 15:23:32,833 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -216986427, now seen corresponding path program 22 times [2021-05-03 15:23:32,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:32,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883854379] [2021-05-03 15:23:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883854379] [2021-05-03 15:23:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206617063] [2021-05-03 15:23:32,907 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:32,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:32,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:23:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:33,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:33,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 15:23:33,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83531966] [2021-05-03 15:23:33,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:23:33,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:23:33,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:23:33,109 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:33,644 INFO L93 Difference]: Finished difference Result 92 states and 163 transitions. [2021-05-03 15:23:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:23:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-05-03 15:23:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:33,644 INFO L225 Difference]: With dead ends: 92 [2021-05-03 15:23:33,644 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 15:23:33,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:23:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 15:23:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 15:23:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 15:23:33,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-05-03 15:23:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:33,645 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 15:23:33,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 15:23:33,645 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 15:23:33,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 15:23:33,856 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:23:33 BasicIcfg [2021-05-03 15:23:33,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:23:33,856 INFO L168 Benchmark]: Toolchain (without parser) took 25506.70 ms. Allocated memory was 333.4 MB in the beginning and 482.3 MB in the end (delta: 148.9 MB). Free memory was 312.7 MB in the beginning and 243.9 MB in the end (delta: 68.8 MB). Peak memory consumption was 218.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:23:33,857 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 333.4 MB. Free memory is still 313.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:23:33,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.41 ms. Allocated memory is still 333.4 MB. Free memory was 312.6 MB in the beginning and 311.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:23:33,857 INFO L168 Benchmark]: Boogie Preprocessor took 9.90 ms. Allocated memory is still 333.4 MB. Free memory was 311.1 MB in the beginning and 310.2 MB in the end (delta: 969.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:23:33,857 INFO L168 Benchmark]: RCFGBuilder took 192.96 ms. Allocated memory is still 333.4 MB. Free memory was 310.2 MB in the beginning and 298.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 15:23:33,857 INFO L168 Benchmark]: TraceAbstraction took 25280.08 ms. Allocated memory was 333.4 MB in the beginning and 482.3 MB in the end (delta: 148.9 MB). Free memory was 298.3 MB in the beginning and 243.9 MB in the end (delta: 54.4 MB). Peak memory consumption was 203.4 MB. Max. memory is 16.0 GB. [2021-05-03 15:23:33,857 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 0.10 ms. Allocated memory is still 333.4 MB. Free memory is still 313.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.41 ms. Allocated memory is still 333.4 MB. Free memory was 312.6 MB in the beginning and 311.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.90 ms. Allocated memory is still 333.4 MB. Free memory was 311.1 MB in the beginning and 310.2 MB in the end (delta: 969.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 192.96 ms. Allocated memory is still 333.4 MB. Free memory was 310.2 MB in the beginning and 298.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 25280.08 ms. Allocated memory was 333.4 MB in the beginning and 482.3 MB in the end (delta: 148.9 MB). Free memory was 298.3 MB in the beginning and 243.9 MB in the end (delta: 54.4 MB). Peak memory consumption was 203.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 51]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25193.4ms, OverallIterations: 28, TraceHistogramMax: 3, EmptinessCheckTime: 16.5ms, AutomataDifference: 11271.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 546 SDtfs, 3085 SDslu, 3682 SDs, 0 SdLazy, 7001 SolverSat, 414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2596.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 289 SyntacticMatches, 26 SemanticMatches, 903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 12889.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, InterpolantAutomatonStates: 642, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.2ms AutomataMinimizationTime, 28 MinimizatonAttempts, 848 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 62.5ms SsaConstructionTime, 231.8ms SatisfiabilityAnalysisTime, 7428.4ms InterpolantComputationTime, 1078 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 12797 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 14/226 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 proved your program to be correct! Received shutdown request...