/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/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:13:55,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:13:55,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:13:55,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 04:13:55,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 04:13:55,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 04:13:55,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 04:13:55,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 04:13:55,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 04:13:55,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 04:13:55,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 04:13:55,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 04:13:55,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 04:13:55,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 04:13:55,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 04:13:55,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 04:13:55,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 04:13:55,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 04:13:55,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 04:13:55,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 04:13:55,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 04:13:55,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 04:13:55,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 04:13:55,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 04:13:55,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 04:13:55,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 04:13:55,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 04:13:55,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 04:13:55,654 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 [2021-04-15 04:13:55,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:13:55,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:13:55,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:13:55,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:13:55,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:13:55,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:13:55,692 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:13:55,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:13:55,693 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:13:55,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:13:55,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:13:55,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:13:55,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:13:55,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:13:55,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:13:55,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:13:55,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:13:55,695 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:13:55,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:13:55,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:13:55,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:13:55,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:13:55,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:13:55,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:13:55,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:13:55,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:13:55,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:13:55,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:13:55,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:13:55,697 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:13:55,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:13:55,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:13:56,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:13:56,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:13:56,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:13:56,047 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:13:56,049 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:13:56,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-04-15 04:13:56,050 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-04-15 04:13:56,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:13:56,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:13:56,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:13:56,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:13:56,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:13:56,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:13:56,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:13:56,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:13:56,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:13:56,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/1) ... [2021-04-15 04:13:56,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:13:56,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:13:56,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:13:56,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:13:56,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (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 [2021-04-15 04:13:56,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:13:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:13:56,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:13:56,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:13:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:13:56,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:13:56,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:13:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:13:56,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:13:56,337 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 04:13:56,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 04:13:56,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 04:13:56,338 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:13:56,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:13:56,581 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:13:56,583 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:13:56 BoogieIcfgContainer [2021-04-15 04:13:56,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:13:56,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:13:56,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:13:56,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:13:56,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:13:56" (1/2) ... [2021-04-15 04:13:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e3fd81 and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:13:56, skipping insertion in model container [2021-04-15 04:13:56,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:13:56" (2/2) ... [2021-04-15 04:13:56,589 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-04-15 04:13:56,593 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:13:56,593 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:13:56,596 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:13:56,597 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:13:56,661 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 04:13:56,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 04:13:56,710 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:13:56,710 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:13:56,710 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:13:56,711 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:13:56,711 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:13:56,711 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:13:56,711 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:13:56,711 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:13:56,718 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-04-15 04:13:56,737 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:13:56,748 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:56,748 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:56,749 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:56,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-04-15 04:13:56,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:56,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166847057] [2021-04-15 04:13:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:56,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166847057] [2021-04-15 04:13:56,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:13:56,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 04:13:56,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404354452] [2021-04-15 04:13:56,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:13:56,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:56,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:13:56,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:13:56,946 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:57,031 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-04-15 04:13:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:13:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 04:13:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:57,051 INFO L225 Difference]: With dead ends: 186 [2021-04-15 04:13:57,051 INFO L226 Difference]: Without dead ends: 186 [2021-04-15 04:13:57,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:13:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-04-15 04:13:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-04-15 04:13:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-04-15 04:13:57,128 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-04-15 04:13:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:57,129 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-04-15 04:13:57,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-04-15 04:13:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:13:57,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:57,136 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:57,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:13:57,137 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash -30759958, now seen corresponding path program 1 times [2021-04-15 04:13:57,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:57,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989721015] [2021-04-15 04:13:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:57,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989721015] [2021-04-15 04:13:57,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:13:57,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 04:13:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330970758] [2021-04-15 04:13:57,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:13:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:13:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:13:57,176 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:57,205 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-04-15 04:13:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:13:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-04-15 04:13:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:57,209 INFO L225 Difference]: With dead ends: 151 [2021-04-15 04:13:57,209 INFO L226 Difference]: Without dead ends: 151 [2021-04-15 04:13:57,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:13:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-04-15 04:13:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-04-15 04:13:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-04-15 04:13:57,233 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-04-15 04:13:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:57,233 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-04-15 04:13:57,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-04-15 04:13:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:13:57,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:57,235 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:57,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 04:13:57,235 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash 635090215, now seen corresponding path program 1 times [2021-04-15 04:13:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:57,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629329484] [2021-04-15 04:13:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:57,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629329484] [2021-04-15 04:13:57,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:13:57,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 04:13:57,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049814381] [2021-04-15 04:13:57,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:13:57,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:13:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:13:57,317 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:57,408 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-04-15 04:13:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:13:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:13:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:57,411 INFO L225 Difference]: With dead ends: 223 [2021-04-15 04:13:57,411 INFO L226 Difference]: Without dead ends: 223 [2021-04-15 04:13:57,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:13:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-04-15 04:13:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-04-15 04:13:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-04-15 04:13:57,423 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-04-15 04:13:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:57,423 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-04-15 04:13:57,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-04-15 04:13:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 04:13:57,425 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:57,425 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:57,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 04:13:57,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:57,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:57,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1690862269, now seen corresponding path program 1 times [2021-04-15 04:13:57,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:57,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055462114] [2021-04-15 04:13:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:13:57,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055462114] [2021-04-15 04:13:57,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:13:57,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 04:13:57,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134238972] [2021-04-15 04:13:57,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:13:57,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:13:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:13:57,472 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:57,516 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-04-15 04:13:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:13:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-04-15 04:13:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:57,520 INFO L225 Difference]: With dead ends: 344 [2021-04-15 04:13:57,520 INFO L226 Difference]: Without dead ends: 308 [2021-04-15 04:13:57,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:13:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-04-15 04:13:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-04-15 04:13:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-04-15 04:13:57,544 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-04-15 04:13:57,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:57,544 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-04-15 04:13:57,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-04-15 04:13:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:13:57,546 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:57,546 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:57,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 04:13:57,546 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:57,547 INFO L82 PathProgramCache]: Analyzing trace with hash 451315555, now seen corresponding path program 2 times [2021-04-15 04:13:57,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:57,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783496764] [2021-04-15 04:13:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:13:57,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783496764] [2021-04-15 04:13:57,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953521703] [2021-04-15 04:13:57,695 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:57,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:13:57,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:57,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:13:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:13:58,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:58,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 04:13:58,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506639389] [2021-04-15 04:13:58,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:13:58,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:13:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:13:58,182 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:58,901 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-04-15 04:13:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:13:58,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:13:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:58,906 INFO L225 Difference]: With dead ends: 545 [2021-04-15 04:13:58,906 INFO L226 Difference]: Without dead ends: 545 [2021-04-15 04:13:58,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:13:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-04-15 04:13:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-04-15 04:13:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-04-15 04:13:58,926 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-04-15 04:13:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:58,926 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-04-15 04:13:58,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-04-15 04:13:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:13:58,929 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:58,929 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:59,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:59,149 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash 564518119, now seen corresponding path program 3 times [2021-04-15 04:13:59,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:59,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728399599] [2021-04-15 04:13:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:59,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728399599] [2021-04-15 04:13:59,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253914193] [2021-04-15 04:13:59,253 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 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 [2021-04-15 04:13:59,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:13:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:13:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:59,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:59,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 04:13:59,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653243223] [2021-04-15 04:13:59,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:13:59,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:13:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:13:59,532 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:00,361 INFO L93 Difference]: Finished difference Result 874 states and 2542 transitions. [2021-04-15 04:14:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:14:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:14:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:00,369 INFO L225 Difference]: With dead ends: 874 [2021-04-15 04:14:00,371 INFO L226 Difference]: Without dead ends: 874 [2021-04-15 04:14:00,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:14:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-04-15 04:14:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 392. [2021-04-15 04:14:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0051150895140664) internal successors, (1175), 391 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1175 transitions. [2021-04-15 04:14:00,391 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1175 transitions. Word has length 30 [2021-04-15 04:14:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:00,393 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1175 transitions. [2021-04-15 04:14:00,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1175 transitions. [2021-04-15 04:14:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:14:00,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:00,400 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:00,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 04:14:00,620 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash 743116131, now seen corresponding path program 4 times [2021-04-15 04:14:00,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:00,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949391972] [2021-04-15 04:14:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:14:00,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949391972] [2021-04-15 04:14:00,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276738038] [2021-04-15 04:14:00,717 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 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 [2021-04-15 04:14:00,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:14:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:14:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:14:00,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:00,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 04:14:00,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956154625] [2021-04-15 04:14:00,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:14:00,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:00,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:14:00,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:14:00,852 INFO L87 Difference]: Start difference. First operand 392 states and 1175 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:01,036 INFO L93 Difference]: Finished difference Result 800 states and 2390 transitions. [2021-04-15 04:14:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:14:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:14:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:01,041 INFO L225 Difference]: With dead ends: 800 [2021-04-15 04:14:01,041 INFO L226 Difference]: Without dead ends: 800 [2021-04-15 04:14:01,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:14:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-04-15 04:14:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 521. [2021-04-15 04:14:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.1134615384615385) internal successors, (1619), 520 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1619 transitions. [2021-04-15 04:14:01,060 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1619 transitions. Word has length 30 [2021-04-15 04:14:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:01,060 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1619 transitions. [2021-04-15 04:14:01,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1619 transitions. [2021-04-15 04:14:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:14:01,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:01,062 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:01,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 04:14:01,277 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1461330985, now seen corresponding path program 5 times [2021-04-15 04:14:01,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:01,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412929783] [2021-04-15 04:14:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412929783] [2021-04-15 04:14:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243254846] [2021-04-15 04:14:01,379 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 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 [2021-04-15 04:14:01,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:14:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:14:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:01,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:01,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 04:14:01,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410225578] [2021-04-15 04:14:01,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:14:01,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:14:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:14:01,607 INFO L87 Difference]: Start difference. First operand 521 states and 1619 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:02,541 INFO L93 Difference]: Finished difference Result 2062 states and 6284 transitions. [2021-04-15 04:14:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:14:02,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:14:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:02,558 INFO L225 Difference]: With dead ends: 2062 [2021-04-15 04:14:02,558 INFO L226 Difference]: Without dead ends: 2062 [2021-04-15 04:14:02,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:14:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-04-15 04:14:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1269. [2021-04-15 04:14:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.1553627760252367) internal successors, (4001), 1268 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4001 transitions. [2021-04-15 04:14:02,616 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4001 transitions. Word has length 30 [2021-04-15 04:14:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:02,617 INFO L480 AbstractCegarLoop]: Abstraction has 1269 states and 4001 transitions. [2021-04-15 04:14:02,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4001 transitions. [2021-04-15 04:14:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:14:02,621 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:02,621 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:02,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:02,845 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1450700455, now seen corresponding path program 6 times [2021-04-15 04:14:02,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:02,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843799918] [2021-04-15 04:14:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:02,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843799918] [2021-04-15 04:14:02,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176483662] [2021-04-15 04:14:02,913 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 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 [2021-04-15 04:14:02,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:14:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:14:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:03,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:03,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 04:14:03,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339608481] [2021-04-15 04:14:03,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:14:03,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:14:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:14:03,037 INFO L87 Difference]: Start difference. First operand 1269 states and 4001 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:03,215 INFO L93 Difference]: Finished difference Result 1797 states and 5545 transitions. [2021-04-15 04:14:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:14:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:14:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:03,225 INFO L225 Difference]: With dead ends: 1797 [2021-04-15 04:14:03,225 INFO L226 Difference]: Without dead ends: 1797 [2021-04-15 04:14:03,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:14:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-04-15 04:14:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1209. [2021-04-15 04:14:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.138245033112583) internal successors, (3791), 1208 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3791 transitions. [2021-04-15 04:14:03,269 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3791 transitions. Word has length 30 [2021-04-15 04:14:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:03,270 INFO L480 AbstractCegarLoop]: Abstraction has 1209 states and 3791 transitions. [2021-04-15 04:14:03,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3791 transitions. [2021-04-15 04:14:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:14:03,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:03,275 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:03,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 04:14:03,489 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1660018845, now seen corresponding path program 7 times [2021-04-15 04:14:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:03,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126458296] [2021-04-15 04:14:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:03,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126458296] [2021-04-15 04:14:03,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370262788] [2021-04-15 04:14:03,620 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 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 [2021-04-15 04:14:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:14:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:03,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:03,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 04:14:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349202314] [2021-04-15 04:14:03,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:14:03,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:14:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:14:03,706 INFO L87 Difference]: Start difference. First operand 1209 states and 3791 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:03,852 INFO L93 Difference]: Finished difference Result 2345 states and 7301 transitions. [2021-04-15 04:14:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:14:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:14:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:03,865 INFO L225 Difference]: With dead ends: 2345 [2021-04-15 04:14:03,865 INFO L226 Difference]: Without dead ends: 2345 [2021-04-15 04:14:03,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:14:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-04-15 04:14:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1749. [2021-04-15 04:14:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.230549199084668) internal successors, (5647), 1748 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5647 transitions. [2021-04-15 04:14:03,929 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5647 transitions. Word has length 30 [2021-04-15 04:14:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:03,930 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 5647 transitions. [2021-04-15 04:14:03,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5647 transitions. [2021-04-15 04:14:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:14:03,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:03,935 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:04,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:04,149 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash 125703753, now seen corresponding path program 8 times [2021-04-15 04:14:04,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:04,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169705255] [2021-04-15 04:14:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:14:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169705255] [2021-04-15 04:14:04,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898581895] [2021-04-15 04:14:04,241 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 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 [2021-04-15 04:14:04,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:14:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:04,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 04:14:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:14:04,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:04,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-04-15 04:14:04,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979698747] [2021-04-15 04:14:04,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:14:04,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:04,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:14:04,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:14:04,540 INFO L87 Difference]: Start difference. First operand 1749 states and 5647 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-04-15 04:14:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:05,030 INFO L93 Difference]: Finished difference Result 2383 states and 7508 transitions. [2021-04-15 04:14:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 04:14:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 32 [2021-04-15 04:14:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:05,043 INFO L225 Difference]: With dead ends: 2383 [2021-04-15 04:14:05,043 INFO L226 Difference]: Without dead ends: 2383 [2021-04-15 04:14:05,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:14:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-04-15 04:14:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1915. [2021-04-15 04:14:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.239811912225705) internal successors, (6201), 1914 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6201 transitions. [2021-04-15 04:14:05,112 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6201 transitions. Word has length 32 [2021-04-15 04:14:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:05,113 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 6201 transitions. [2021-04-15 04:14:05,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-04-15 04:14:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6201 transitions. [2021-04-15 04:14:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:14:05,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:05,119 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:05,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:05,333 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash 47423557, now seen corresponding path program 9 times [2021-04-15 04:14:05,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:05,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579139496] [2021-04-15 04:14:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:14:05,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579139496] [2021-04-15 04:14:05,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003525166] [2021-04-15 04:14:05,421 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 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 [2021-04-15 04:14:05,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:14:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 04:14:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:05,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:05,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 04:14:05,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125547147] [2021-04-15 04:14:05,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:14:05,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:14:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:14:05,605 INFO L87 Difference]: Start difference. First operand 1915 states and 6201 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:06,381 INFO L93 Difference]: Finished difference Result 3613 states and 11319 transitions. [2021-04-15 04:14:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:14:06,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 04:14:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:06,403 INFO L225 Difference]: With dead ends: 3613 [2021-04-15 04:14:06,403 INFO L226 Difference]: Without dead ends: 3613 [2021-04-15 04:14:06,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 04:14:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-04-15 04:14:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2052. [2021-04-15 04:14:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.2457337883959045) internal successors, (6657), 2051 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6657 transitions. [2021-04-15 04:14:06,480 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6657 transitions. Word has length 32 [2021-04-15 04:14:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:06,480 INFO L480 AbstractCegarLoop]: Abstraction has 2052 states and 6657 transitions. [2021-04-15 04:14:06,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6657 transitions. [2021-04-15 04:14:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:14:06,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:06,487 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:06,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 04:14:06,701 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:06,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1904870325, now seen corresponding path program 10 times [2021-04-15 04:14:06,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:06,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265062639] [2021-04-15 04:14:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:06,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265062639] [2021-04-15 04:14:06,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67924482] [2021-04-15 04:14:06,817 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 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 [2021-04-15 04:14:06,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:14:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 04:14:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:07,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:07,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-04-15 04:14:07,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803575166] [2021-04-15 04:14:07,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:14:07,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:14:07,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:14:07,011 INFO L87 Difference]: Start difference. First operand 2052 states and 6657 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:07,410 INFO L93 Difference]: Finished difference Result 4372 states and 13767 transitions. [2021-04-15 04:14:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 04:14:07,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 04:14:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:07,437 INFO L225 Difference]: With dead ends: 4372 [2021-04-15 04:14:07,438 INFO L226 Difference]: Without dead ends: 4372 [2021-04-15 04:14:07,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:14:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-04-15 04:14:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3140. [2021-04-15 04:14:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.294361261548264) internal successors, (10341), 3139 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 10341 transitions. [2021-04-15 04:14:07,566 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 10341 transitions. Word has length 32 [2021-04-15 04:14:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:07,567 INFO L480 AbstractCegarLoop]: Abstraction has 3140 states and 10341 transitions. [2021-04-15 04:14:07,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 10341 transitions. [2021-04-15 04:14:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:14:07,578 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:07,578 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:07,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:07,793 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1718839609, now seen corresponding path program 11 times [2021-04-15 04:14:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:07,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519503043] [2021-04-15 04:14:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:07,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519503043] [2021-04-15 04:14:07,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127603699] [2021-04-15 04:14:07,906 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:14:07,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:14:07,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 04:14:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:08,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:08,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-04-15 04:14:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991296088] [2021-04-15 04:14:08,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 04:14:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 04:14:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:14:08,154 INFO L87 Difference]: Start difference. First operand 3140 states and 10341 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:09,789 INFO L93 Difference]: Finished difference Result 9020 states and 28737 transitions. [2021-04-15 04:14:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:14:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 04:14:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:09,820 INFO L225 Difference]: With dead ends: 9020 [2021-04-15 04:14:09,820 INFO L226 Difference]: Without dead ends: 9020 [2021-04-15 04:14:09,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1240.2ms TimeCoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 04:14:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-04-15 04:14:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 5832. [2021-04-15 04:14:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.3656319670725434) internal successors, (19625), 5831 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19625 transitions. [2021-04-15 04:14:10,026 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19625 transitions. Word has length 32 [2021-04-15 04:14:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:10,026 INFO L480 AbstractCegarLoop]: Abstraction has 5832 states and 19625 transitions. [2021-04-15 04:14:10,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19625 transitions. [2021-04-15 04:14:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:14:10,036 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:10,037 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:10,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:10,253 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -866066123, now seen corresponding path program 12 times [2021-04-15 04:14:10,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:10,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61113332] [2021-04-15 04:14:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61113332] [2021-04-15 04:14:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235885243] [2021-04-15 04:14:10,424 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 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 [2021-04-15 04:14:10,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:14:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 04:14:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:10,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:10,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-04-15 04:14:10,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353084036] [2021-04-15 04:14:10,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:14:10,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:10,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:14:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:14:10,551 INFO L87 Difference]: Start difference. First operand 5832 states and 19625 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:11,677 INFO L93 Difference]: Finished difference Result 12646 states and 40893 transitions. [2021-04-15 04:14:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:14:11,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 04:14:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:11,726 INFO L225 Difference]: With dead ends: 12646 [2021-04-15 04:14:11,726 INFO L226 Difference]: Without dead ends: 12646 [2021-04-15 04:14:11,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:14:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2021-04-15 04:14:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 6547. [2021-04-15 04:14:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 3.340360525511763) internal successors, (21866), 6546 states have internal predecessors, (21866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 21866 transitions. [2021-04-15 04:14:12,028 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 21866 transitions. Word has length 32 [2021-04-15 04:14:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:12,029 INFO L480 AbstractCegarLoop]: Abstraction has 6547 states and 21866 transitions. [2021-04-15 04:14:12,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 21866 transitions. [2021-04-15 04:14:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 04:14:12,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:12,041 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:12,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 04:14:12,263 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1685658193, now seen corresponding path program 13 times [2021-04-15 04:14:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:12,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292027954] [2021-04-15 04:14:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:14:12,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292027954] [2021-04-15 04:14:12,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337450616] [2021-04-15 04:14:12,343 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 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 [2021-04-15 04:14:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:14:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:14:12,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:12,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 04:14:12,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011702038] [2021-04-15 04:14:12,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:14:12,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:12,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:14:12,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:14:12,450 INFO L87 Difference]: Start difference. First operand 6547 states and 21866 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:12,557 INFO L93 Difference]: Finished difference Result 8397 states and 27709 transitions. [2021-04-15 04:14:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:14:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 04:14:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:12,584 INFO L225 Difference]: With dead ends: 8397 [2021-04-15 04:14:12,585 INFO L226 Difference]: Without dead ends: 8397 [2021-04-15 04:14:12,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:14:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-04-15 04:14:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6574. [2021-04-15 04:14:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 3.3476342613722805) internal successors, (22004), 6573 states have internal predecessors, (22004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 22004 transitions. [2021-04-15 04:14:12,794 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 22004 transitions. Word has length 32 [2021-04-15 04:14:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:12,795 INFO L480 AbstractCegarLoop]: Abstraction has 6574 states and 22004 transitions. [2021-04-15 04:14:12,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 22004 transitions. [2021-04-15 04:14:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:12,809 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:12,809 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:13,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 04:14:13,030 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:13,031 INFO L82 PathProgramCache]: Analyzing trace with hash -626027993, now seen corresponding path program 14 times [2021-04-15 04:14:13,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:13,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136657254] [2021-04-15 04:14:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:14:13,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136657254] [2021-04-15 04:14:13,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176122674] [2021-04-15 04:14:13,369 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:14:13,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:14:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:13,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:14:13,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:14,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:14,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:14:14,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239437776] [2021-04-15 04:14:14,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:14:14,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:14:14,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:14:14,137 INFO L87 Difference]: Start difference. First operand 6574 states and 22004 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:16,239 INFO L93 Difference]: Finished difference Result 8244 states and 26601 transitions. [2021-04-15 04:14:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:14:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:16,259 INFO L225 Difference]: With dead ends: 8244 [2021-04-15 04:14:16,259 INFO L226 Difference]: Without dead ends: 8170 [2021-04-15 04:14:16,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1709.9ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:14:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-04-15 04:14:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 6796. [2021-04-15 04:14:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.33495217071376) internal successors, (22661), 6795 states have internal predecessors, (22661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22661 transitions. [2021-04-15 04:14:16,444 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22661 transitions. Word has length 34 [2021-04-15 04:14:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:16,444 INFO L480 AbstractCegarLoop]: Abstraction has 6796 states and 22661 transitions. [2021-04-15 04:14:16,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22661 transitions. [2021-04-15 04:14:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:16,457 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:16,458 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:16,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 04:14:16,658 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash -66991577, now seen corresponding path program 15 times [2021-04-15 04:14:16,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:16,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344561608] [2021-04-15 04:14:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:17,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344561608] [2021-04-15 04:14:17,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597286054] [2021-04-15 04:14:17,045 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 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 [2021-04-15 04:14:17,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:14:17,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:17,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:14:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:17,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:17,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-04-15 04:14:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039815346] [2021-04-15 04:14:17,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:14:17,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:14:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:14:17,727 INFO L87 Difference]: Start difference. First operand 6796 states and 22661 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:21,588 INFO L93 Difference]: Finished difference Result 12070 states and 38381 transitions. [2021-04-15 04:14:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-04-15 04:14:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:21,618 INFO L225 Difference]: With dead ends: 12070 [2021-04-15 04:14:21,618 INFO L226 Difference]: Without dead ends: 11996 [2021-04-15 04:14:21,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 3114.8ms TimeCoverageRelationStatistics Valid=1280, Invalid=6376, Unknown=0, NotChecked=0, Total=7656 [2021-04-15 04:14:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-04-15 04:14:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 7004. [2021-04-15 04:14:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 3.3399971440811083) internal successors, (23390), 7003 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 23390 transitions. [2021-04-15 04:14:21,856 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 23390 transitions. Word has length 34 [2021-04-15 04:14:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:21,856 INFO L480 AbstractCegarLoop]: Abstraction has 7004 states and 23390 transitions. [2021-04-15 04:14:21,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 23390 transitions. [2021-04-15 04:14:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:21,870 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:21,870 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:22,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:22,092 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1955785949, now seen corresponding path program 16 times [2021-04-15 04:14:22,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:22,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794964903] [2021-04-15 04:14:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:22,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794964903] [2021-04-15 04:14:22,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414076809] [2021-04-15 04:14:22,509 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 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 [2021-04-15 04:14:22,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:14:22,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:22,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:14:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:23,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:23,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-04-15 04:14:23,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513304288] [2021-04-15 04:14:23,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:14:23,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:23,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:14:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:14:23,265 INFO L87 Difference]: Start difference. First operand 7004 states and 23390 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:25,771 INFO L93 Difference]: Finished difference Result 13107 states and 41620 transitions. [2021-04-15 04:14:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:14:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:25,814 INFO L225 Difference]: With dead ends: 13107 [2021-04-15 04:14:25,814 INFO L226 Difference]: Without dead ends: 13046 [2021-04-15 04:14:25,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2477.8ms TimeCoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 04:14:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-04-15 04:14:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 7052. [2021-04-15 04:14:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 3.3450574386611827) internal successors, (23586), 7051 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 23586 transitions. [2021-04-15 04:14:26,170 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 23586 transitions. Word has length 34 [2021-04-15 04:14:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:26,170 INFO L480 AbstractCegarLoop]: Abstraction has 7052 states and 23586 transitions. [2021-04-15 04:14:26,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 23586 transitions. [2021-04-15 04:14:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:26,185 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:26,185 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:26,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:26,400 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 311935523, now seen corresponding path program 17 times [2021-04-15 04:14:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:26,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134417206] [2021-04-15 04:14:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:26,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134417206] [2021-04-15 04:14:26,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800005606] [2021-04-15 04:14:26,696 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 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 [2021-04-15 04:14:26,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:14:26,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:14:26,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:27,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:27,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-04-15 04:14:27,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426823284] [2021-04-15 04:14:27,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:14:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:14:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:14:27,446 INFO L87 Difference]: Start difference. First operand 7052 states and 23586 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:31,257 INFO L93 Difference]: Finished difference Result 15153 states and 48281 transitions. [2021-04-15 04:14:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-04-15 04:14:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:31,290 INFO L225 Difference]: With dead ends: 15153 [2021-04-15 04:14:31,290 INFO L226 Difference]: Without dead ends: 15073 [2021-04-15 04:14:31,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3094.1ms TimeCoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2021-04-15 04:14:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-04-15 04:14:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 7120. [2021-04-15 04:14:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.345975558364939) internal successors, (23820), 7119 states have internal predecessors, (23820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 23820 transitions. [2021-04-15 04:14:31,501 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 23820 transitions. Word has length 34 [2021-04-15 04:14:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:31,501 INFO L480 AbstractCegarLoop]: Abstraction has 7120 states and 23820 transitions. [2021-04-15 04:14:31,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 23820 transitions. [2021-04-15 04:14:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:31,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:31,518 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:31,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:31,737 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1634184655, now seen corresponding path program 18 times [2021-04-15 04:14:31,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:31,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401931927] [2021-04-15 04:14:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:32,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401931927] [2021-04-15 04:14:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761580083] [2021-04-15 04:14:32,017 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 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 [2021-04-15 04:14:32,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:14:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:32,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:14:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:32,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:32,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-04-15 04:14:32,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708461743] [2021-04-15 04:14:32,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:14:32,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:32,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:14:32,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:14:32,717 INFO L87 Difference]: Start difference. First operand 7120 states and 23820 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:34,830 INFO L93 Difference]: Finished difference Result 10976 states and 35019 transitions. [2021-04-15 04:14:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:14:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:34,853 INFO L225 Difference]: With dead ends: 10976 [2021-04-15 04:14:34,853 INFO L226 Difference]: Without dead ends: 10902 [2021-04-15 04:14:34,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1592.4ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:14:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-04-15 04:14:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 7382. [2021-04-15 04:14:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.341959084134941) internal successors, (24667), 7381 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 24667 transitions. [2021-04-15 04:14:35,060 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 24667 transitions. Word has length 34 [2021-04-15 04:14:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:35,060 INFO L480 AbstractCegarLoop]: Abstraction has 7382 states and 24667 transitions. [2021-04-15 04:14:35,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 24667 transitions. [2021-04-15 04:14:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:35,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:35,073 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:35,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:35,281 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash -981282097, now seen corresponding path program 19 times [2021-04-15 04:14:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:35,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140756617] [2021-04-15 04:14:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:35,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140756617] [2021-04-15 04:14:35,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819681420] [2021-04-15 04:14:35,599 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 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 [2021-04-15 04:14:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:14:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:36,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:36,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-04-15 04:14:36,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496034138] [2021-04-15 04:14:36,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:14:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:14:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:14:36,550 INFO L87 Difference]: Start difference. First operand 7382 states and 24667 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:40,772 INFO L93 Difference]: Finished difference Result 14490 states and 46802 transitions. [2021-04-15 04:14:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-04-15 04:14:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:40,803 INFO L225 Difference]: With dead ends: 14490 [2021-04-15 04:14:40,803 INFO L226 Difference]: Without dead ends: 14422 [2021-04-15 04:14:40,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 3552.7ms TimeCoverageRelationStatistics Valid=1500, Invalid=7430, Unknown=0, NotChecked=0, Total=8930 [2021-04-15 04:14:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-04-15 04:14:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 7458. [2021-04-15 04:14:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.347995172321309) internal successors, (24966), 7457 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 24966 transitions. [2021-04-15 04:14:41,050 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 24966 transitions. Word has length 34 [2021-04-15 04:14:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:41,050 INFO L480 AbstractCegarLoop]: Abstraction has 7458 states and 24966 transitions. [2021-04-15 04:14:41,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 24966 transitions. [2021-04-15 04:14:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:41,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:41,063 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:41,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-04-15 04:14:41,263 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash -263714097, now seen corresponding path program 20 times [2021-04-15 04:14:41,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:41,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508359670] [2021-04-15 04:14:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508359670] [2021-04-15 04:14:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735840601] [2021-04-15 04:14:41,601 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:14:41,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:14:41,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:41,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:14:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:42,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:42,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-04-15 04:14:42,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768454308] [2021-04-15 04:14:42,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:14:42,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:14:42,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:14:42,405 INFO L87 Difference]: Start difference. First operand 7458 states and 24966 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:47,053 INFO L93 Difference]: Finished difference Result 16738 states and 53735 transitions. [2021-04-15 04:14:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 04:14:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:47,087 INFO L225 Difference]: With dead ends: 16738 [2021-04-15 04:14:47,088 INFO L226 Difference]: Without dead ends: 16649 [2021-04-15 04:14:47,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 3760.5ms TimeCoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-04-15 04:14:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16649 states. [2021-04-15 04:14:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16649 to 7399. [2021-04-15 04:14:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.34279535009462) internal successors, (24730), 7398 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 24730 transitions. [2021-04-15 04:14:47,321 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 24730 transitions. Word has length 34 [2021-04-15 04:14:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:47,321 INFO L480 AbstractCegarLoop]: Abstraction has 7399 states and 24730 transitions. [2021-04-15 04:14:47,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 24730 transitions. [2021-04-15 04:14:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:47,332 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:47,332 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:47,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:47,545 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1457868367, now seen corresponding path program 21 times [2021-04-15 04:14:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:47,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945507509] [2021-04-15 04:14:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:47,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945507509] [2021-04-15 04:14:47,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20130079] [2021-04-15 04:14:47,866 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:47,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:14:47,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:14:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:48,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:48,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:14:48,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867613898] [2021-04-15 04:14:48,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:14:48,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:14:48,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:14:48,612 INFO L87 Difference]: Start difference. First operand 7399 states and 24730 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:50,613 INFO L93 Difference]: Finished difference Result 10507 states and 33915 transitions. [2021-04-15 04:14:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:14:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:50,635 INFO L225 Difference]: With dead ends: 10507 [2021-04-15 04:14:50,635 INFO L226 Difference]: Without dead ends: 10433 [2021-04-15 04:14:50,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1758.9ms TimeCoverageRelationStatistics Valid=497, Invalid=2809, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:14:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10433 states. [2021-04-15 04:14:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10433 to 7467. [2021-04-15 04:14:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 3.343691401017948) internal successors, (24964), 7466 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 24964 transitions. [2021-04-15 04:14:50,823 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 24964 transitions. Word has length 34 [2021-04-15 04:14:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:50,823 INFO L480 AbstractCegarLoop]: Abstraction has 7467 states and 24964 transitions. [2021-04-15 04:14:50,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 24964 transitions. [2021-04-15 04:14:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:50,837 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:50,837 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:51,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-04-15 04:14:51,038 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:51,039 INFO L82 PathProgramCache]: Analyzing trace with hash 225770019, now seen corresponding path program 22 times [2021-04-15 04:14:51,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:51,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105239255] [2021-04-15 04:14:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:51,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105239255] [2021-04-15 04:14:51,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305772363] [2021-04-15 04:14:51,323 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:51,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:14:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:14:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:51,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:51,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:14:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877328180] [2021-04-15 04:14:51,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:14:51,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:14:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:14:51,989 INFO L87 Difference]: Start difference. First operand 7467 states and 24964 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:53,633 INFO L93 Difference]: Finished difference Result 10806 states and 35580 transitions. [2021-04-15 04:14:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:14:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:53,659 INFO L225 Difference]: With dead ends: 10806 [2021-04-15 04:14:53,659 INFO L226 Difference]: Without dead ends: 10726 [2021-04-15 04:14:53,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1364.0ms TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:14:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2021-04-15 04:14:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 7493. [2021-04-15 04:14:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7493 states, 7492 states have (on average 3.3449012279765085) internal successors, (25060), 7492 states have internal predecessors, (25060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7493 states to 7493 states and 25060 transitions. [2021-04-15 04:14:53,885 INFO L78 Accepts]: Start accepts. Automaton has 7493 states and 25060 transitions. Word has length 34 [2021-04-15 04:14:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:53,886 INFO L480 AbstractCegarLoop]: Abstraction has 7493 states and 25060 transitions. [2021-04-15 04:14:53,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7493 states and 25060 transitions. [2021-04-15 04:14:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:53,897 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:53,897 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:54,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-15 04:14:54,098 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 155659983, now seen corresponding path program 23 times [2021-04-15 04:14:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:54,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631051928] [2021-04-15 04:14:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:54,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631051928] [2021-04-15 04:14:54,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783892536] [2021-04-15 04:14:54,351 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 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 [2021-04-15 04:14:54,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:14:54,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:14:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:55,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:55,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:14:55,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444588714] [2021-04-15 04:14:55,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:14:55,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:55,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:14:55,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:14:55,056 INFO L87 Difference]: Start difference. First operand 7493 states and 25060 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:56,397 INFO L93 Difference]: Finished difference Result 9997 states and 33060 transitions. [2021-04-15 04:14:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:14:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:14:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:56,419 INFO L225 Difference]: With dead ends: 9997 [2021-04-15 04:14:56,419 INFO L226 Difference]: Without dead ends: 9917 [2021-04-15 04:14:56,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1301.5ms TimeCoverageRelationStatistics Valid=431, Invalid=1921, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:14:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9917 states. [2021-04-15 04:14:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9917 to 7497. [2021-04-15 04:14:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7497 states, 7496 states have (on average 3.344717182497332) internal successors, (25072), 7496 states have internal predecessors, (25072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7497 states to 7497 states and 25072 transitions. [2021-04-15 04:14:56,589 INFO L78 Accepts]: Start accepts. Automaton has 7497 states and 25072 transitions. Word has length 34 [2021-04-15 04:14:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:56,589 INFO L480 AbstractCegarLoop]: Abstraction has 7497 states and 25072 transitions. [2021-04-15 04:14:56,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7497 states and 25072 transitions. [2021-04-15 04:14:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:14:56,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:56,599 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:56,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:56,800 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1636532363, now seen corresponding path program 24 times [2021-04-15 04:14:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:56,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472202172] [2021-04-15 04:14:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:57,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472202172] [2021-04-15 04:14:57,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120260635] [2021-04-15 04:14:57,253 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 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 [2021-04-15 04:14:57,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 04:14:57,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:14:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:58,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:58,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:14:58,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568301371] [2021-04-15 04:14:58,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:14:58,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:14:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:14:58,015 INFO L87 Difference]: Start difference. First operand 7497 states and 25072 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:00,029 INFO L93 Difference]: Finished difference Result 15494 states and 50514 transitions. [2021-04-15 04:15:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:15:00,029 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:00,054 INFO L225 Difference]: With dead ends: 15494 [2021-04-15 04:15:00,055 INFO L226 Difference]: Without dead ends: 15396 [2021-04-15 04:15:00,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1890.8ms TimeCoverageRelationStatistics Valid=646, Invalid=2434, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:15:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15396 states. [2021-04-15 04:15:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15396 to 7549. [2021-04-15 04:15:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 7548 states have (on average 3.34525702172761) internal successors, (25250), 7548 states have internal predecessors, (25250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 25250 transitions. [2021-04-15 04:15:00,251 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 25250 transitions. Word has length 34 [2021-04-15 04:15:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:00,251 INFO L480 AbstractCegarLoop]: Abstraction has 7549 states and 25250 transitions. [2021-04-15 04:15:00,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 25250 transitions. [2021-04-15 04:15:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:00,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:00,266 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:00,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-04-15 04:15:00,467 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash -182677553, now seen corresponding path program 25 times [2021-04-15 04:15:00,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:00,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463897204] [2021-04-15 04:15:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:00,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463897204] [2021-04-15 04:15:00,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870144849] [2021-04-15 04:15:00,785 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 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 [2021-04-15 04:15:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:01,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:01,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:15:01,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110177345] [2021-04-15 04:15:01,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:01,470 INFO L87 Difference]: Start difference. First operand 7549 states and 25250 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:02,896 INFO L93 Difference]: Finished difference Result 10123 states and 33462 transitions. [2021-04-15 04:15:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:15:02,898 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:02,923 INFO L225 Difference]: With dead ends: 10123 [2021-04-15 04:15:02,923 INFO L226 Difference]: Without dead ends: 10043 [2021-04-15 04:15:02,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1393.8ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:15:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10043 states. [2021-04-15 04:15:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10043 to 7553. [2021-04-15 04:15:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7553 states, 7552 states have (on average 3.345074152542373) internal successors, (25262), 7552 states have internal predecessors, (25262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7553 states to 7553 states and 25262 transitions. [2021-04-15 04:15:03,099 INFO L78 Accepts]: Start accepts. Automaton has 7553 states and 25262 transitions. Word has length 34 [2021-04-15 04:15:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:03,099 INFO L480 AbstractCegarLoop]: Abstraction has 7553 states and 25262 transitions. [2021-04-15 04:15:03,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 7553 states and 25262 transitions. [2021-04-15 04:15:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:03,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:03,112 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:03,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:03,325 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1501827023, now seen corresponding path program 26 times [2021-04-15 04:15:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:03,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745240571] [2021-04-15 04:15:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:03,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745240571] [2021-04-15 04:15:03,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356260759] [2021-04-15 04:15:03,626 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 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 [2021-04-15 04:15:03,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:15:03,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:04,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:04,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:15:04,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106863523] [2021-04-15 04:15:04,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:15:04,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:15:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:15:04,466 INFO L87 Difference]: Start difference. First operand 7553 states and 25262 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:05,915 INFO L93 Difference]: Finished difference Result 10085 states and 33358 transitions. [2021-04-15 04:15:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:15:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:05,939 INFO L225 Difference]: With dead ends: 10085 [2021-04-15 04:15:05,940 INFO L226 Difference]: Without dead ends: 10005 [2021-04-15 04:15:05,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1482.1ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:15:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-04-15 04:15:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 7557. [2021-04-15 04:15:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7557 states, 7556 states have (on average 3.344891476971943) internal successors, (25274), 7556 states have internal predecessors, (25274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 25274 transitions. [2021-04-15 04:15:06,115 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 25274 transitions. Word has length 34 [2021-04-15 04:15:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:06,115 INFO L480 AbstractCegarLoop]: Abstraction has 7557 states and 25274 transitions. [2021-04-15 04:15:06,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 25274 transitions. [2021-04-15 04:15:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:06,127 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:06,127 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:06,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-04-15 04:15:06,328 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -754693493, now seen corresponding path program 27 times [2021-04-15 04:15:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:06,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739080489] [2021-04-15 04:15:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739080489] [2021-04-15 04:15:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277615214] [2021-04-15 04:15:06,677 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 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 [2021-04-15 04:15:06,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:15:06,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:15:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:07,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:07,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:15:07,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750086993] [2021-04-15 04:15:07,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:07,470 INFO L87 Difference]: Start difference. First operand 7557 states and 25274 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:09,231 INFO L93 Difference]: Finished difference Result 9733 states and 31784 transitions. [2021-04-15 04:15:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:15:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:09,253 INFO L225 Difference]: With dead ends: 9733 [2021-04-15 04:15:09,253 INFO L226 Difference]: Without dead ends: 9659 [2021-04-15 04:15:09,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1622.2ms TimeCoverageRelationStatistics Valid=472, Invalid=2078, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:15:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-04-15 04:15:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 7653. [2021-04-15 04:15:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.346314688970204) internal successors, (25606), 7652 states have internal predecessors, (25606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 25606 transitions. [2021-04-15 04:15:09,446 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 25606 transitions. Word has length 34 [2021-04-15 04:15:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:09,446 INFO L480 AbstractCegarLoop]: Abstraction has 7653 states and 25606 transitions. [2021-04-15 04:15:09,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 25606 transitions. [2021-04-15 04:15:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:09,463 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:09,463 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:09,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:09,673 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1856335409, now seen corresponding path program 28 times [2021-04-15 04:15:09,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:09,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020417141] [2021-04-15 04:15:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:09,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020417141] [2021-04-15 04:15:09,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714673949] [2021-04-15 04:15:09,923 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:09,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:15:09,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:10,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:10,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:15:10,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545566786] [2021-04-15 04:15:10,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:10,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:10,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:10,669 INFO L87 Difference]: Start difference. First operand 7653 states and 25606 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:12,038 INFO L93 Difference]: Finished difference Result 9773 states and 32268 transitions. [2021-04-15 04:15:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 04:15:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:12,060 INFO L225 Difference]: With dead ends: 9773 [2021-04-15 04:15:12,060 INFO L226 Difference]: Without dead ends: 9693 [2021-04-15 04:15:12,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1343.5ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:15:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9693 states. [2021-04-15 04:15:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9693 to 7653. [2021-04-15 04:15:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.346314688970204) internal successors, (25606), 7652 states have internal predecessors, (25606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 25606 transitions. [2021-04-15 04:15:12,228 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 25606 transitions. Word has length 34 [2021-04-15 04:15:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:12,228 INFO L480 AbstractCegarLoop]: Abstraction has 7653 states and 25606 transitions. [2021-04-15 04:15:12,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 25606 transitions. [2021-04-15 04:15:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:12,242 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:12,242 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:12,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-04-15 04:15:12,444 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2021710497, now seen corresponding path program 29 times [2021-04-15 04:15:12,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:12,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134978052] [2021-04-15 04:15:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:12,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134978052] [2021-04-15 04:15:12,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30299742] [2021-04-15 04:15:12,849 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:12,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:15:12,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:15:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:13,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:13,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-04-15 04:15:13,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898676237] [2021-04-15 04:15:13,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:15:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:15:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:15:13,777 INFO L87 Difference]: Start difference. First operand 7653 states and 25606 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:17,414 INFO L93 Difference]: Finished difference Result 13112 states and 42688 transitions. [2021-04-15 04:15:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 04:15:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:17,447 INFO L225 Difference]: With dead ends: 13112 [2021-04-15 04:15:17,447 INFO L226 Difference]: Without dead ends: 13031 [2021-04-15 04:15:17,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3322.9ms TimeCoverageRelationStatistics Valid=1068, Invalid=5094, Unknown=0, NotChecked=0, Total=6162 [2021-04-15 04:15:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13031 states. [2021-04-15 04:15:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13031 to 7721. [2021-04-15 04:15:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7721 states, 7720 states have (on average 3.34559585492228) internal successors, (25828), 7720 states have internal predecessors, (25828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7721 states to 7721 states and 25828 transitions. [2021-04-15 04:15:17,663 INFO L78 Accepts]: Start accepts. Automaton has 7721 states and 25828 transitions. Word has length 34 [2021-04-15 04:15:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:17,664 INFO L480 AbstractCegarLoop]: Abstraction has 7721 states and 25828 transitions. [2021-04-15 04:15:17,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7721 states and 25828 transitions. [2021-04-15 04:15:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:17,676 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:17,676 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:17,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:17,877 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:17,877 INFO L82 PathProgramCache]: Analyzing trace with hash -675691165, now seen corresponding path program 30 times [2021-04-15 04:15:17,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:17,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44833102] [2021-04-15 04:15:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:18,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44833102] [2021-04-15 04:15:18,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009649651] [2021-04-15 04:15:18,321 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:15:18,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:15:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:15:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:19,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:19,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:15:19,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077333049] [2021-04-15 04:15:19,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:19,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:19,063 INFO L87 Difference]: Start difference. First operand 7721 states and 25828 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:23,259 INFO L93 Difference]: Finished difference Result 15251 states and 49221 transitions. [2021-04-15 04:15:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-04-15 04:15:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:23,294 INFO L225 Difference]: With dead ends: 15251 [2021-04-15 04:15:23,295 INFO L226 Difference]: Without dead ends: 15177 [2021-04-15 04:15:23,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 3364.1ms TimeCoverageRelationStatistics Valid=1082, Invalid=6058, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 04:15:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15177 states. [2021-04-15 04:15:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15177 to 7945. [2021-04-15 04:15:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7945 states, 7944 states have (on average 3.3479355488418934) internal successors, (26596), 7944 states have internal predecessors, (26596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 26596 transitions. [2021-04-15 04:15:23,558 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 26596 transitions. Word has length 34 [2021-04-15 04:15:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:23,558 INFO L480 AbstractCegarLoop]: Abstraction has 7945 states and 26596 transitions. [2021-04-15 04:15:23,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 26596 transitions. [2021-04-15 04:15:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:23,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:23,570 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:23,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-04-15 04:15:23,771 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1041158451, now seen corresponding path program 31 times [2021-04-15 04:15:23,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:23,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60745027] [2021-04-15 04:15:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60745027] [2021-04-15 04:15:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590674699] [2021-04-15 04:15:24,122 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:24,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:24,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:15:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324413890] [2021-04-15 04:15:24,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:24,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:24,937 INFO L87 Difference]: Start difference. First operand 7945 states and 26596 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:27,421 INFO L93 Difference]: Finished difference Result 12294 states and 40513 transitions. [2021-04-15 04:15:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:15:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:27,449 INFO L225 Difference]: With dead ends: 12294 [2021-04-15 04:15:27,450 INFO L226 Difference]: Without dead ends: 12214 [2021-04-15 04:15:27,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1906.6ms TimeCoverageRelationStatistics Valid=497, Invalid=2695, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:15:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12214 states. [2021-04-15 04:15:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12214 to 7941. [2021-04-15 04:15:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7940 states have (on average 3.348110831234257) internal successors, (26584), 7940 states have internal predecessors, (26584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 26584 transitions. [2021-04-15 04:15:27,645 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 26584 transitions. Word has length 34 [2021-04-15 04:15:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:27,645 INFO L480 AbstractCegarLoop]: Abstraction has 7941 states and 26584 transitions. [2021-04-15 04:15:27,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 26584 transitions. [2021-04-15 04:15:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:27,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:27,657 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:27,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:27,862 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash 971048415, now seen corresponding path program 32 times [2021-04-15 04:15:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632338018] [2021-04-15 04:15:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:28,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632338018] [2021-04-15 04:15:28,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2382325] [2021-04-15 04:15:28,292 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:15:28,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:15:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:29,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:29,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:15:29,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638737164] [2021-04-15 04:15:29,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:15:29,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:15:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:15:29,151 INFO L87 Difference]: Start difference. First operand 7941 states and 26584 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:30,937 INFO L93 Difference]: Finished difference Result 11513 states and 38054 transitions. [2021-04-15 04:15:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:15:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:30,966 INFO L225 Difference]: With dead ends: 11513 [2021-04-15 04:15:30,966 INFO L226 Difference]: Without dead ends: 11433 [2021-04-15 04:15:30,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1835.9ms TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:15:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11433 states. [2021-04-15 04:15:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11433 to 7941. [2021-04-15 04:15:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7940 states have (on average 3.348110831234257) internal successors, (26584), 7940 states have internal predecessors, (26584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 26584 transitions. [2021-04-15 04:15:31,169 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 26584 transitions. Word has length 34 [2021-04-15 04:15:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:31,169 INFO L480 AbstractCegarLoop]: Abstraction has 7941 states and 26584 transitions. [2021-04-15 04:15:31,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 26584 transitions. [2021-04-15 04:15:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:31,183 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:31,183 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:31,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-04-15 04:15:31,384 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1843046501, now seen corresponding path program 33 times [2021-04-15 04:15:31,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:31,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642430883] [2021-04-15 04:15:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:31,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642430883] [2021-04-15 04:15:31,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16065771] [2021-04-15 04:15:31,790 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:31,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 04:15:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:15:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:32,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:32,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:15:32,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617283876] [2021-04-15 04:15:32,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:32,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:32,563 INFO L87 Difference]: Start difference. First operand 7941 states and 26584 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:35,204 INFO L93 Difference]: Finished difference Result 17002 states and 55579 transitions. [2021-04-15 04:15:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 04:15:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:35,248 INFO L225 Difference]: With dead ends: 17002 [2021-04-15 04:15:35,248 INFO L226 Difference]: Without dead ends: 16904 [2021-04-15 04:15:35,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2122.1ms TimeCoverageRelationStatistics Valid=610, Invalid=2470, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:15:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16904 states. [2021-04-15 04:15:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16904 to 7835. [2021-04-15 04:15:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7835 states, 7834 states have (on average 3.3443962215981617) internal successors, (26200), 7834 states have internal predecessors, (26200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7835 states to 7835 states and 26200 transitions. [2021-04-15 04:15:35,510 INFO L78 Accepts]: Start accepts. Automaton has 7835 states and 26200 transitions. Word has length 34 [2021-04-15 04:15:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:35,511 INFO L480 AbstractCegarLoop]: Abstraction has 7835 states and 26200 transitions. [2021-04-15 04:15:35,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7835 states and 26200 transitions. [2021-04-15 04:15:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:35,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:35,524 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:35,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-04-15 04:15:35,741 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash 632710879, now seen corresponding path program 34 times [2021-04-15 04:15:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:35,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066932829] [2021-04-15 04:15:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:36,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066932829] [2021-04-15 04:15:36,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014476781] [2021-04-15 04:15:36,052 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:36,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:15:36,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:36,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:36,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:36,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:15:36,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821228111] [2021-04-15 04:15:36,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:36,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:36,984 INFO L87 Difference]: Start difference. First operand 7835 states and 26200 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:38,947 INFO L93 Difference]: Finished difference Result 11237 states and 37110 transitions. [2021-04-15 04:15:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:15:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:38,971 INFO L225 Difference]: With dead ends: 11237 [2021-04-15 04:15:38,971 INFO L226 Difference]: Without dead ends: 11157 [2021-04-15 04:15:38,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1758.2ms TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:15:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2021-04-15 04:15:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 7807. [2021-04-15 04:15:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7807 states, 7806 states have (on average 3.345631565462465) internal successors, (26116), 7806 states have internal predecessors, (26116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 26116 transitions. [2021-04-15 04:15:39,160 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 26116 transitions. Word has length 34 [2021-04-15 04:15:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:39,160 INFO L480 AbstractCegarLoop]: Abstraction has 7807 states and 26116 transitions. [2021-04-15 04:15:39,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 26116 transitions. [2021-04-15 04:15:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:39,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:39,172 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:39,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:39,373 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1437152207, now seen corresponding path program 35 times [2021-04-15 04:15:39,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:39,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453970985] [2021-04-15 04:15:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:39,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453970985] [2021-04-15 04:15:39,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882596344] [2021-04-15 04:15:39,750 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:39,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:15:39,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:15:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:40,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:40,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-04-15 04:15:40,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510105179] [2021-04-15 04:15:40,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:15:40,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:15:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:15:40,710 INFO L87 Difference]: Start difference. First operand 7807 states and 26116 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:44,479 INFO L93 Difference]: Finished difference Result 11191 states and 36476 transitions. [2021-04-15 04:15:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 04:15:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:44,508 INFO L225 Difference]: With dead ends: 11191 [2021-04-15 04:15:44,508 INFO L226 Difference]: Without dead ends: 11137 [2021-04-15 04:15:44,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3153.3ms TimeCoverageRelationStatistics Valid=786, Invalid=4044, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 04:15:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11137 states. [2021-04-15 04:15:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11137 to 7967. [2021-04-15 04:15:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7967 states, 7966 states have (on average 3.3457193070549835) internal successors, (26652), 7966 states have internal predecessors, (26652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7967 states to 7967 states and 26652 transitions. [2021-04-15 04:15:44,734 INFO L78 Accepts]: Start accepts. Automaton has 7967 states and 26652 transitions. Word has length 34 [2021-04-15 04:15:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:44,734 INFO L480 AbstractCegarLoop]: Abstraction has 7967 states and 26652 transitions. [2021-04-15 04:15:44,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7967 states and 26652 transitions. [2021-04-15 04:15:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:44,748 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:44,748 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:44,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:44,973 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1511795757, now seen corresponding path program 36 times [2021-04-15 04:15:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:44,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330848194] [2021-04-15 04:15:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330848194] [2021-04-15 04:15:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064636380] [2021-04-15 04:15:45,394 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:45,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:15:45,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:15:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:46,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:46,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:15:46,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794960290] [2021-04-15 04:15:46,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:46,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:46,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:46,196 INFO L87 Difference]: Start difference. First operand 7967 states and 26652 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:52,573 INFO L93 Difference]: Finished difference Result 13939 states and 44966 transitions. [2021-04-15 04:15:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-04-15 04:15:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:52,610 INFO L225 Difference]: With dead ends: 13939 [2021-04-15 04:15:52,610 INFO L226 Difference]: Without dead ends: 13865 [2021-04-15 04:15:52,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 5103.1ms TimeCoverageRelationStatistics Valid=1574, Invalid=6982, Unknown=0, NotChecked=0, Total=8556 [2021-04-15 04:15:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13865 states. [2021-04-15 04:15:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13865 to 8125. [2021-04-15 04:15:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8125 states, 8124 states have (on average 3.345888724766125) internal successors, (27182), 8124 states have internal predecessors, (27182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8125 states to 8125 states and 27182 transitions. [2021-04-15 04:15:52,845 INFO L78 Accepts]: Start accepts. Automaton has 8125 states and 27182 transitions. Word has length 34 [2021-04-15 04:15:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:52,845 INFO L480 AbstractCegarLoop]: Abstraction has 8125 states and 27182 transitions. [2021-04-15 04:15:52,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8125 states and 27182 transitions. [2021-04-15 04:15:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:52,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:52,862 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:53,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:53,062 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash -716648281, now seen corresponding path program 37 times [2021-04-15 04:15:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:53,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100427106] [2021-04-15 04:15:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:53,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100427106] [2021-04-15 04:15:53,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489977519] [2021-04-15 04:15:53,446 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:53,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:53,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:54,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:54,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:15:54,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010731567] [2021-04-15 04:15:54,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:15:54,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:54,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:15:54,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:15:54,263 INFO L87 Difference]: Start difference. First operand 8125 states and 27182 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:57,504 INFO L93 Difference]: Finished difference Result 11417 states and 37437 transitions. [2021-04-15 04:15:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:15:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:15:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:57,532 INFO L225 Difference]: With dead ends: 11417 [2021-04-15 04:15:57,532 INFO L226 Difference]: Without dead ends: 11349 [2021-04-15 04:15:57,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2755.4ms TimeCoverageRelationStatistics Valid=611, Invalid=3171, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:15:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11349 states. [2021-04-15 04:15:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11349 to 8157. [2021-04-15 04:15:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.3464933791074056) internal successors, (27294), 8156 states have internal predecessors, (27294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 27294 transitions. [2021-04-15 04:15:57,732 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 27294 transitions. Word has length 34 [2021-04-15 04:15:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:57,732 INFO L480 AbstractCegarLoop]: Abstraction has 8157 states and 27294 transitions. [2021-04-15 04:15:57,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 27294 transitions. [2021-04-15 04:15:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:15:57,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:57,745 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:57,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:57,946 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 205053859, now seen corresponding path program 38 times [2021-04-15 04:15:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:57,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762000609] [2021-04-15 04:15:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:58,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762000609] [2021-04-15 04:15:58,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546716185] [2021-04-15 04:15:58,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:58,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:15:58,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:15:58,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:59,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:59,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:15:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878026777] [2021-04-15 04:15:59,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:15:59,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:15:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:15:59,447 INFO L87 Difference]: Start difference. First operand 8157 states and 27294 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:01,955 INFO L93 Difference]: Finished difference Result 11889 states and 38718 transitions. [2021-04-15 04:16:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:16:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:01,984 INFO L225 Difference]: With dead ends: 11889 [2021-04-15 04:16:01,984 INFO L226 Difference]: Without dead ends: 11809 [2021-04-15 04:16:01,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2339.4ms TimeCoverageRelationStatistics Valid=492, Invalid=2058, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:16:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11809 states. [2021-04-15 04:16:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11809 to 8147. [2021-04-15 04:16:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8147 states, 8146 states have (on average 3.3452000982077092) internal successors, (27250), 8146 states have internal predecessors, (27250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8147 states to 8147 states and 27250 transitions. [2021-04-15 04:16:02,184 INFO L78 Accepts]: Start accepts. Automaton has 8147 states and 27250 transitions. Word has length 34 [2021-04-15 04:16:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:02,185 INFO L480 AbstractCegarLoop]: Abstraction has 8147 states and 27250 transitions. [2021-04-15 04:16:02,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:02,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8147 states and 27250 transitions. [2021-04-15 04:16:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:02,197 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:02,197 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:02,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:02,397 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 134943823, now seen corresponding path program 39 times [2021-04-15 04:16:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:02,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559067979] [2021-04-15 04:16:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559067979] [2021-04-15 04:16:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484176397] [2021-04-15 04:16:02,776 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:02,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:16:02,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:02,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:16:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:03,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:03,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:16:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748336226] [2021-04-15 04:16:03,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:16:03,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:16:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:16:03,586 INFO L87 Difference]: Start difference. First operand 8147 states and 27250 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:06,070 INFO L93 Difference]: Finished difference Result 12817 states and 41850 transitions. [2021-04-15 04:16:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:16:06,072 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:06,109 INFO L225 Difference]: With dead ends: 12817 [2021-04-15 04:16:06,109 INFO L226 Difference]: Without dead ends: 12737 [2021-04-15 04:16:06,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2079.5ms TimeCoverageRelationStatistics Valid=493, Invalid=2057, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:16:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12737 states. [2021-04-15 04:16:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12737 to 8151. [2021-04-15 04:16:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8151 states, 8150 states have (on average 3.3450306748466256) internal successors, (27262), 8150 states have internal predecessors, (27262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8151 states to 8151 states and 27262 transitions. [2021-04-15 04:16:06,432 INFO L78 Accepts]: Start accepts. Automaton has 8151 states and 27262 transitions. Word has length 34 [2021-04-15 04:16:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:06,432 INFO L480 AbstractCegarLoop]: Abstraction has 8151 states and 27262 transitions. [2021-04-15 04:16:06,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 8151 states and 27262 transitions. [2021-04-15 04:16:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:06,446 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:06,446 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:06,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-04-15 04:16:06,646 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash 898248203, now seen corresponding path program 40 times [2021-04-15 04:16:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:06,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809293141] [2021-04-15 04:16:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:07,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809293141] [2021-04-15 04:16:07,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568352661] [2021-04-15 04:16:07,158 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:07,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:16:07,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:16:07,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:08,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:08,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-04-15 04:16:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818355499] [2021-04-15 04:16:08,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:16:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:16:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:16:08,374 INFO L87 Difference]: Start difference. First operand 8151 states and 27262 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:12,757 INFO L93 Difference]: Finished difference Result 13475 states and 43513 transitions. [2021-04-15 04:16:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 04:16:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:12,794 INFO L225 Difference]: With dead ends: 13475 [2021-04-15 04:16:12,794 INFO L226 Difference]: Without dead ends: 13407 [2021-04-15 04:16:12,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 3970.1ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 04:16:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13407 states. [2021-04-15 04:16:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13407 to 8651. [2021-04-15 04:16:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8651 states, 8650 states have (on average 3.3384971098265894) internal successors, (28878), 8650 states have internal predecessors, (28878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 28878 transitions. [2021-04-15 04:16:13,082 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 28878 transitions. Word has length 34 [2021-04-15 04:16:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:13,082 INFO L480 AbstractCegarLoop]: Abstraction has 8651 states and 28878 transitions. [2021-04-15 04:16:13,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 28878 transitions. [2021-04-15 04:16:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:13,098 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:13,098 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:13,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-04-15 04:16:13,299 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1615816203, now seen corresponding path program 41 times [2021-04-15 04:16:13,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:13,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310470115] [2021-04-15 04:16:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:13,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310470115] [2021-04-15 04:16:13,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379165401] [2021-04-15 04:16:13,871 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:13,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 04:16:13,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:16:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:14,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:14,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-04-15 04:16:14,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332347161] [2021-04-15 04:16:14,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:16:14,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:14,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:16:14,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:16:14,652 INFO L87 Difference]: Start difference. First operand 8651 states and 28878 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:18,146 INFO L93 Difference]: Finished difference Result 17351 states and 56316 transitions. [2021-04-15 04:16:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 04:16:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:18,195 INFO L225 Difference]: With dead ends: 17351 [2021-04-15 04:16:18,195 INFO L226 Difference]: Without dead ends: 17244 [2021-04-15 04:16:18,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2834.0ms TimeCoverageRelationStatistics Valid=668, Invalid=2992, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 04:16:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17244 states. [2021-04-15 04:16:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17244 to 8757. [2021-04-15 04:16:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8756 states have (on average 3.340109639104614) internal successors, (29246), 8756 states have internal predecessors, (29246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 29246 transitions. [2021-04-15 04:16:18,479 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 29246 transitions. Word has length 34 [2021-04-15 04:16:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:18,480 INFO L480 AbstractCegarLoop]: Abstraction has 8757 states and 29246 transitions. [2021-04-15 04:16:18,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 29246 transitions. [2021-04-15 04:16:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:18,495 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:18,495 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:18,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:18,701 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash -203393713, now seen corresponding path program 42 times [2021-04-15 04:16:18,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:18,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872040395] [2021-04-15 04:16:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:19,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872040395] [2021-04-15 04:16:19,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301400807] [2021-04-15 04:16:19,263 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:19,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 04:16:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:16:19,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:20,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:20,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:16:20,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600129500] [2021-04-15 04:16:20,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:16:20,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:16:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:16:20,322 INFO L87 Difference]: Start difference. First operand 8757 states and 29246 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:22,913 INFO L93 Difference]: Finished difference Result 14383 states and 46850 transitions. [2021-04-15 04:16:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:16:22,914 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:22,948 INFO L225 Difference]: With dead ends: 14383 [2021-04-15 04:16:22,948 INFO L226 Difference]: Without dead ends: 14303 [2021-04-15 04:16:22,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2565.2ms TimeCoverageRelationStatistics Valid=501, Invalid=2151, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:16:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14303 states. [2021-04-15 04:16:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14303 to 8765. [2021-04-15 04:16:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8764 states have (on average 3.3397991784573255) internal successors, (29270), 8764 states have internal predecessors, (29270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 29270 transitions. [2021-04-15 04:16:23,177 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 29270 transitions. Word has length 34 [2021-04-15 04:16:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:23,177 INFO L480 AbstractCegarLoop]: Abstraction has 8765 states and 29270 transitions. [2021-04-15 04:16:23,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 29270 transitions. [2021-04-15 04:16:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:23,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:23,191 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:23,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:23,391 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash -115829921, now seen corresponding path program 43 times [2021-04-15 04:16:23,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:23,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224560634] [2021-04-15 04:16:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224560634] [2021-04-15 04:16:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744891063] [2021-04-15 04:16:23,774 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:16:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:24,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:24,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:16:24,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380102067] [2021-04-15 04:16:24,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:16:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:16:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:16:24,825 INFO L87 Difference]: Start difference. First operand 8765 states and 29270 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:28,772 INFO L93 Difference]: Finished difference Result 15131 states and 48760 transitions. [2021-04-15 04:16:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 04:16:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:28,809 INFO L225 Difference]: With dead ends: 15131 [2021-04-15 04:16:28,810 INFO L226 Difference]: Without dead ends: 15077 [2021-04-15 04:16:28,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3332.8ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:16:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15077 states. [2021-04-15 04:16:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15077 to 8903. [2021-04-15 04:16:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 8902 states have (on average 3.343518310492024) internal successors, (29764), 8902 states have internal predecessors, (29764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 29764 transitions. [2021-04-15 04:16:29,048 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 29764 transitions. Word has length 34 [2021-04-15 04:16:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:29,048 INFO L480 AbstractCegarLoop]: Abstraction has 8903 states and 29764 transitions. [2021-04-15 04:16:29,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 29764 transitions. [2021-04-15 04:16:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:29,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:29,061 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:29,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:29,262 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1033093599, now seen corresponding path program 44 times [2021-04-15 04:16:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:29,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179247304] [2021-04-15 04:16:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:29,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179247304] [2021-04-15 04:16:29,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411260364] [2021-04-15 04:16:29,795 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:16:29,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:16:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:29,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:16:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:30,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:30,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:16:30,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053641251] [2021-04-15 04:16:30,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:16:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:16:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:16:30,701 INFO L87 Difference]: Start difference. First operand 8903 states and 29764 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:34,813 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-04-15 04:16:36,426 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:16:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:36,546 INFO L93 Difference]: Finished difference Result 17172 states and 55161 transitions. [2021-04-15 04:16:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 04:16:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:36,588 INFO L225 Difference]: With dead ends: 17172 [2021-04-15 04:16:36,588 INFO L226 Difference]: Without dead ends: 17092 [2021-04-15 04:16:36,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 5055.1ms TimeCoverageRelationStatistics Valid=1182, Invalid=5298, Unknown=0, NotChecked=0, Total=6480 [2021-04-15 04:16:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17092 states. [2021-04-15 04:16:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17092 to 9001. [2021-04-15 04:16:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 3.349111111111111) internal successors, (30142), 9000 states have internal predecessors, (30142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 30142 transitions. [2021-04-15 04:16:36,865 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 30142 transitions. Word has length 34 [2021-04-15 04:16:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:36,865 INFO L480 AbstractCegarLoop]: Abstraction has 9001 states and 30142 transitions. [2021-04-15 04:16:36,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 30142 transitions. [2021-04-15 04:16:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:36,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:36,879 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:37,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:37,079 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131039, now seen corresponding path program 45 times [2021-04-15 04:16:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:37,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955316357] [2021-04-15 04:16:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:37,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955316357] [2021-04-15 04:16:37,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865304866] [2021-04-15 04:16:37,695 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:37,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:16:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:16:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:38,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:38,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:16:38,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76168802] [2021-04-15 04:16:38,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:16:38,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:38,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:16:38,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:16:38,611 INFO L87 Difference]: Start difference. First operand 9001 states and 30142 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:42,237 INFO L93 Difference]: Finished difference Result 15874 states and 52118 transitions. [2021-04-15 04:16:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:16:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:42,278 INFO L225 Difference]: With dead ends: 15874 [2021-04-15 04:16:42,278 INFO L226 Difference]: Without dead ends: 15794 [2021-04-15 04:16:42,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 3175.6ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:16:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15794 states. [2021-04-15 04:16:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15794 to 9151. [2021-04-15 04:16:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9151 states, 9150 states have (on average 3.354754098360656) internal successors, (30696), 9150 states have internal predecessors, (30696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9151 states to 9151 states and 30696 transitions. [2021-04-15 04:16:42,534 INFO L78 Accepts]: Start accepts. Automaton has 9151 states and 30696 transitions. Word has length 34 [2021-04-15 04:16:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:42,534 INFO L480 AbstractCegarLoop]: Abstraction has 9151 states and 30696 transitions. [2021-04-15 04:16:42,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9151 states and 30696 transitions. [2021-04-15 04:16:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:42,548 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:42,549 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:42,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:42,749 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash 934876179, now seen corresponding path program 46 times [2021-04-15 04:16:42,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:42,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100902903] [2021-04-15 04:16:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:43,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100902903] [2021-04-15 04:16:43,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387439557] [2021-04-15 04:16:43,150 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:43,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:16:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:16:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:44,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:44,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-04-15 04:16:44,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202704541] [2021-04-15 04:16:44,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:16:44,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:16:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:16:44,425 INFO L87 Difference]: Start difference. First operand 9151 states and 30696 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:46,862 INFO L93 Difference]: Finished difference Result 14368 states and 46831 transitions. [2021-04-15 04:16:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:16:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:46,901 INFO L225 Difference]: With dead ends: 14368 [2021-04-15 04:16:46,901 INFO L226 Difference]: Without dead ends: 14307 [2021-04-15 04:16:46,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2370.8ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 04:16:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14307 states. [2021-04-15 04:16:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14307 to 9221. [2021-04-15 04:16:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9221 states, 9220 states have (on average 3.3550976138828634) internal successors, (30934), 9220 states have internal predecessors, (30934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9221 states to 9221 states and 30934 transitions. [2021-04-15 04:16:47,150 INFO L78 Accepts]: Start accepts. Automaton has 9221 states and 30934 transitions. Word has length 34 [2021-04-15 04:16:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:47,150 INFO L480 AbstractCegarLoop]: Abstraction has 9221 states and 30934 transitions. [2021-04-15 04:16:47,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9221 states and 30934 transitions. [2021-04-15 04:16:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:47,165 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:47,165 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:47,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:47,366 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1092369645, now seen corresponding path program 47 times [2021-04-15 04:16:47,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:47,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628128261] [2021-04-15 04:16:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:47,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628128261] [2021-04-15 04:16:47,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990708038] [2021-04-15 04:16:47,943 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:47,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:16:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:16:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:49,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:49,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-04-15 04:16:49,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916878608] [2021-04-15 04:16:49,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:16:49,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:16:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:16:49,092 INFO L87 Difference]: Start difference. First operand 9221 states and 30934 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:54,608 INFO L93 Difference]: Finished difference Result 19344 states and 63797 transitions. [2021-04-15 04:16:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 04:16:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:16:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:54,667 INFO L225 Difference]: With dead ends: 19344 [2021-04-15 04:16:54,667 INFO L226 Difference]: Without dead ends: 19264 [2021-04-15 04:16:54,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 4186.4ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-04-15 04:16:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19264 states. [2021-04-15 04:16:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19264 to 9196. [2021-04-15 04:16:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 3.353344208809135) internal successors, (30834), 9195 states have internal predecessors, (30834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 30834 transitions. [2021-04-15 04:16:54,996 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 30834 transitions. Word has length 34 [2021-04-15 04:16:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:54,996 INFO L480 AbstractCegarLoop]: Abstraction has 9196 states and 30834 transitions. [2021-04-15 04:16:54,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 30834 transitions. [2021-04-15 04:16:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:16:55,017 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:55,017 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:55,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:55,222 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash -367332205, now seen corresponding path program 48 times [2021-04-15 04:16:55,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:55,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466050231] [2021-04-15 04:16:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:55,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466050231] [2021-04-15 04:16:55,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457777312] [2021-04-15 04:16:55,805 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:55,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:16:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:16:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:57,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:57,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:16:57,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214317590] [2021-04-15 04:16:57,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:16:57,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:57,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:16:57,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:16:57,060 INFO L87 Difference]: Start difference. First operand 9196 states and 30834 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:00,000 INFO L93 Difference]: Finished difference Result 13046 states and 43434 transitions. [2021-04-15 04:17:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:17:00,004 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:00,042 INFO L225 Difference]: With dead ends: 13046 [2021-04-15 04:17:00,043 INFO L226 Difference]: Without dead ends: 12966 [2021-04-15 04:17:00,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2611.9ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:17:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12966 states. [2021-04-15 04:17:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12966 to 9204. [2021-04-15 04:17:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9204 states, 9203 states have (on average 3.3530370531348472) internal successors, (30858), 9203 states have internal predecessors, (30858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9204 states to 9204 states and 30858 transitions. [2021-04-15 04:17:00,272 INFO L78 Accepts]: Start accepts. Automaton has 9204 states and 30858 transitions. Word has length 34 [2021-04-15 04:17:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:00,272 INFO L480 AbstractCegarLoop]: Abstraction has 9204 states and 30858 transitions. [2021-04-15 04:17:00,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 9204 states and 30858 transitions. [2021-04-15 04:17:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:00,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:00,289 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:00,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:00,490 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash -705669741, now seen corresponding path program 49 times [2021-04-15 04:17:00,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:00,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326793780] [2021-04-15 04:17:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326793780] [2021-04-15 04:17:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800021759] [2021-04-15 04:17:00,947 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:17:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:02,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:02,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:17:02,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741468259] [2021-04-15 04:17:02,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:17:02,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:02,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:17:02,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:17:02,199 INFO L87 Difference]: Start difference. First operand 9204 states and 30858 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:05,500 INFO L93 Difference]: Finished difference Result 12958 states and 43180 transitions. [2021-04-15 04:17:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:17:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:05,545 INFO L225 Difference]: With dead ends: 12958 [2021-04-15 04:17:05,546 INFO L226 Difference]: Without dead ends: 12878 [2021-04-15 04:17:05,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2519.3ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:17:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12878 states. [2021-04-15 04:17:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12878 to 9206. [2021-04-15 04:17:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 3.3529603476371537) internal successors, (30864), 9205 states have internal predecessors, (30864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 30864 transitions. [2021-04-15 04:17:05,813 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 30864 transitions. Word has length 34 [2021-04-15 04:17:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:05,813 INFO L480 AbstractCegarLoop]: Abstraction has 9206 states and 30864 transitions. [2021-04-15 04:17:05,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 30864 transitions. [2021-04-15 04:17:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:05,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:05,831 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:06,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:06,032 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:06,032 INFO L82 PathProgramCache]: Analyzing trace with hash 569472659, now seen corresponding path program 50 times [2021-04-15 04:17:06,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:06,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322320796] [2021-04-15 04:17:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:06,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322320796] [2021-04-15 04:17:06,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301899246] [2021-04-15 04:17:06,536 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:06,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:17:06,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:17:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:07,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:07,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:17:07,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881487052] [2021-04-15 04:17:07,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:17:07,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:17:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:17:07,592 INFO L87 Difference]: Start difference. First operand 9206 states and 30864 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:10,506 INFO L93 Difference]: Finished difference Result 12846 states and 42776 transitions. [2021-04-15 04:17:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:17:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:10,541 INFO L225 Difference]: With dead ends: 12846 [2021-04-15 04:17:10,541 INFO L226 Difference]: Without dead ends: 12766 [2021-04-15 04:17:10,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2502.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:17:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12766 states. [2021-04-15 04:17:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12766 to 9150. [2021-04-15 04:17:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 3.3531533500929065) internal successors, (30678), 9149 states have internal predecessors, (30678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 30678 transitions. [2021-04-15 04:17:10,831 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 30678 transitions. Word has length 34 [2021-04-15 04:17:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:10,831 INFO L480 AbstractCegarLoop]: Abstraction has 9150 states and 30678 transitions. [2021-04-15 04:17:10,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 30678 transitions. [2021-04-15 04:17:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:10,846 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:10,847 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:11,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:11,047 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1744662307, now seen corresponding path program 51 times [2021-04-15 04:17:11,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:11,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504515122] [2021-04-15 04:17:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:11,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504515122] [2021-04-15 04:17:11,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365253981] [2021-04-15 04:17:11,682 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:11,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:17:11,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:11,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:17:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:12,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:12,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:17:12,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085574717] [2021-04-15 04:17:12,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:17:12,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:17:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:17:12,948 INFO L87 Difference]: Start difference. First operand 9150 states and 30678 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:17,729 INFO L93 Difference]: Finished difference Result 16697 states and 54344 transitions. [2021-04-15 04:17:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:17:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:17,771 INFO L225 Difference]: With dead ends: 16697 [2021-04-15 04:17:17,771 INFO L226 Difference]: Without dead ends: 16623 [2021-04-15 04:17:17,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 3460.5ms TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:17:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16623 states. [2021-04-15 04:17:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16623 to 9332. [2021-04-15 04:17:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9331 states have (on average 3.3571964419676346) internal successors, (31326), 9331 states have internal predecessors, (31326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 31326 transitions. [2021-04-15 04:17:18,151 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 31326 transitions. Word has length 34 [2021-04-15 04:17:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:18,151 INFO L480 AbstractCegarLoop]: Abstraction has 9332 states and 31326 transitions. [2021-04-15 04:17:18,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 31326 transitions. [2021-04-15 04:17:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:18,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:18,168 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:18,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:18,369 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash 512563959, now seen corresponding path program 52 times [2021-04-15 04:17:18,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:18,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788859570] [2021-04-15 04:17:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:18,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788859570] [2021-04-15 04:17:18,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679340497] [2021-04-15 04:17:18,873 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:18,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:17:18,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:17:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:20,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:20,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:17:20,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339364740] [2021-04-15 04:17:20,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:17:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:17:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:17:20,145 INFO L87 Difference]: Start difference. First operand 9332 states and 31326 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:25,389 INFO L93 Difference]: Finished difference Result 16254 states and 53764 transitions. [2021-04-15 04:17:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:17:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:25,436 INFO L225 Difference]: With dead ends: 16254 [2021-04-15 04:17:25,436 INFO L226 Difference]: Without dead ends: 16174 [2021-04-15 04:17:25,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 3358.5ms TimeCoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:17:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-04-15 04:17:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 9336. [2021-04-15 04:17:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 3.357043385109802) internal successors, (31338), 9335 states have internal predecessors, (31338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 31338 transitions. [2021-04-15 04:17:25,739 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 31338 transitions. Word has length 34 [2021-04-15 04:17:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:25,739 INFO L480 AbstractCegarLoop]: Abstraction has 9336 states and 31338 transitions. [2021-04-15 04:17:25,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 31338 transitions. [2021-04-15 04:17:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:25,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:25,757 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:25,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-04-15 04:17:25,957 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 442453923, now seen corresponding path program 53 times [2021-04-15 04:17:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105226639] [2021-04-15 04:17:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105226639] [2021-04-15 04:17:26,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864507436] [2021-04-15 04:17:26,582 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:26,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:17:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:17:26,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:17:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349341542] [2021-04-15 04:17:27,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:17:27,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:17:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:17:27,852 INFO L87 Difference]: Start difference. First operand 9336 states and 31338 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:32,158 INFO L93 Difference]: Finished difference Result 15410 states and 51212 transitions. [2021-04-15 04:17:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:17:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:32,201 INFO L225 Difference]: With dead ends: 15410 [2021-04-15 04:17:32,201 INFO L226 Difference]: Without dead ends: 15330 [2021-04-15 04:17:32,201 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 3208.1ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:17:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2021-04-15 04:17:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 9336. [2021-04-15 04:17:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 3.357043385109802) internal successors, (31338), 9335 states have internal predecessors, (31338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 31338 transitions. [2021-04-15 04:17:32,493 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 31338 transitions. Word has length 34 [2021-04-15 04:17:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:32,493 INFO L480 AbstractCegarLoop]: Abstraction has 9336 states and 31338 transitions. [2021-04-15 04:17:32,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 31338 transitions. [2021-04-15 04:17:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:32,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:32,510 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:32,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:32,711 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1923326303, now seen corresponding path program 54 times [2021-04-15 04:17:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:32,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089694963] [2021-04-15 04:17:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089694963] [2021-04-15 04:17:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752014191] [2021-04-15 04:17:33,336 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:33,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:17:33,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:17:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:34,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:34,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-04-15 04:17:34,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702103115] [2021-04-15 04:17:34,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:17:34,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:34,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:17:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:17:34,850 INFO L87 Difference]: Start difference. First operand 9336 states and 31338 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:39,623 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-04-15 04:17:39,943 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 04:17:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:40,397 INFO L93 Difference]: Finished difference Result 19374 states and 63284 transitions. [2021-04-15 04:17:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:17:40,399 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:40,461 INFO L225 Difference]: With dead ends: 19374 [2021-04-15 04:17:40,461 INFO L226 Difference]: Without dead ends: 19276 [2021-04-15 04:17:40,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 4342.6ms TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:17:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19276 states. [2021-04-15 04:17:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19276 to 9152. [2021-04-15 04:17:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9152 states, 9151 states have (on average 3.35045350234947) internal successors, (30660), 9151 states have internal predecessors, (30660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9152 states to 9152 states and 30660 transitions. [2021-04-15 04:17:40,828 INFO L78 Accepts]: Start accepts. Automaton has 9152 states and 30660 transitions. Word has length 34 [2021-04-15 04:17:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:40,829 INFO L480 AbstractCegarLoop]: Abstraction has 9152 states and 30660 transitions. [2021-04-15 04:17:40,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9152 states and 30660 transitions. [2021-04-15 04:17:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:40,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:40,849 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:41,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:41,050 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:41,050 INFO L82 PathProgramCache]: Analyzing trace with hash 104116387, now seen corresponding path program 55 times [2021-04-15 04:17:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:41,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231098399] [2021-04-15 04:17:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:41,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231098399] [2021-04-15 04:17:41,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649536135] [2021-04-15 04:17:41,631 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:17:41,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:43,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:43,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-04-15 04:17:43,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506846027] [2021-04-15 04:17:43,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:17:43,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:17:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:17:43,318 INFO L87 Difference]: Start difference. First operand 9152 states and 30660 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:48,527 INFO L93 Difference]: Finished difference Result 14791 states and 49111 transitions. [2021-04-15 04:17:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:17:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:48,574 INFO L225 Difference]: With dead ends: 14791 [2021-04-15 04:17:48,575 INFO L226 Difference]: Without dead ends: 14711 [2021-04-15 04:17:48,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3756.2ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:17:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14711 states. [2021-04-15 04:17:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14711 to 9152. [2021-04-15 04:17:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9152 states, 9151 states have (on average 3.35045350234947) internal successors, (30660), 9151 states have internal predecessors, (30660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9152 states to 9152 states and 30660 transitions. [2021-04-15 04:17:48,859 INFO L78 Accepts]: Start accepts. Automaton has 9152 states and 30660 transitions. Word has length 34 [2021-04-15 04:17:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:48,859 INFO L480 AbstractCegarLoop]: Abstraction has 9152 states and 30660 transitions. [2021-04-15 04:17:48,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 9152 states and 30660 transitions. [2021-04-15 04:17:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:17:48,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:48,876 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:49,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:49,077 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 539636319, now seen corresponding path program 56 times [2021-04-15 04:17:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:49,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327963720] [2021-04-15 04:17:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:49,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327963720] [2021-04-15 04:17:49,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710318214] [2021-04-15 04:17:49,644 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:49,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:17:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:17:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:17:51,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:17:51,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-04-15 04:17:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607037357] [2021-04-15 04:17:51,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:17:51,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:17:51,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:17:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:17:51,084 INFO L87 Difference]: Start difference. First operand 9152 states and 30660 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:52,557 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-04-15 04:17:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:17:57,175 INFO L93 Difference]: Finished difference Result 19949 states and 66387 transitions. [2021-04-15 04:17:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:17:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:17:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:17:57,241 INFO L225 Difference]: With dead ends: 19949 [2021-04-15 04:17:57,241 INFO L226 Difference]: Without dead ends: 19869 [2021-04-15 04:17:57,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 4107.7ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 04:17:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19869 states. [2021-04-15 04:17:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19869 to 9008. [2021-04-15 04:17:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 3.351615410236483) internal successors, (30188), 9007 states have internal predecessors, (30188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 30188 transitions. [2021-04-15 04:17:57,583 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 30188 transitions. Word has length 34 [2021-04-15 04:17:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:17:57,583 INFO L480 AbstractCegarLoop]: Abstraction has 9008 states and 30188 transitions. [2021-04-15 04:17:57,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:17:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 30188 transitions. [2021-04-15 04:17:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:17:57,598 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:17:57,598 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:17:57,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:57,799 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:17:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:17:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash 720113029, now seen corresponding path program 57 times [2021-04-15 04:17:57,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:17:57,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747883531] [2021-04-15 04:17:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:17:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:17:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:17:58,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747883531] [2021-04-15 04:17:58,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732948789] [2021-04-15 04:17:58,721 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:17:58,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:17:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:17:58,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:17:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:17:59,950 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:18:00,142 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:18:00,488 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:18:00,748 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:18:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:01,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:18:01,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-04-15 04:18:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276436079] [2021-04-15 04:18:01,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:18:01,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:18:01,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:18:01,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:18:01,009 INFO L87 Difference]: Start difference. First operand 9008 states and 30188 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:03,169 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:18:04,446 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:18:05,276 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 04:18:06,223 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 04:18:06,858 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-04-15 04:18:07,297 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-04-15 04:18:07,774 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-04-15 04:18:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:18:08,472 INFO L93 Difference]: Finished difference Result 9848 states and 32495 transitions. [2021-04-15 04:18:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:18:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:18:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:18:08,500 INFO L225 Difference]: With dead ends: 9848 [2021-04-15 04:18:08,500 INFO L226 Difference]: Without dead ends: 9734 [2021-04-15 04:18:08,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 5348.4ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:18:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9734 states. [2021-04-15 04:18:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9734 to 9078. [2021-04-15 04:18:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9078 states, 9077 states have (on average 3.3497851713121074) internal successors, (30406), 9077 states have internal predecessors, (30406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9078 states to 9078 states and 30406 transitions. [2021-04-15 04:18:08,716 INFO L78 Accepts]: Start accepts. Automaton has 9078 states and 30406 transitions. Word has length 36 [2021-04-15 04:18:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:18:08,716 INFO L480 AbstractCegarLoop]: Abstraction has 9078 states and 30406 transitions. [2021-04-15 04:18:08,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9078 states and 30406 transitions. [2021-04-15 04:18:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:18:08,732 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:18:08,732 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:18:08,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:08,933 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:18:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:18:08,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1178415995, now seen corresponding path program 58 times [2021-04-15 04:18:08,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:18:08,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922218417] [2021-04-15 04:18:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:18:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:18:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:18:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922218417] [2021-04-15 04:18:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828947224] [2021-04-15 04:18:09,889 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:09,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:18:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:18:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:18:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:18:11,333 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:18:11,631 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:18:11,879 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:18:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:12,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:18:12,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-04-15 04:18:12,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274032550] [2021-04-15 04:18:12,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:18:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:18:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:18:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:18:12,070 INFO L87 Difference]: Start difference. First operand 9078 states and 30406 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:14,283 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:18:14,518 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-04-15 04:18:14,867 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 04:18:15,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:18:15,157 INFO L93 Difference]: Finished difference Result 9601 states and 31787 transitions. [2021-04-15 04:18:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:18:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:18:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:18:15,177 INFO L225 Difference]: With dead ends: 9601 [2021-04-15 04:18:15,177 INFO L226 Difference]: Without dead ends: 9520 [2021-04-15 04:18:15,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4022.4ms TimeCoverageRelationStatistics Valid=410, Invalid=1942, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:18:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2021-04-15 04:18:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 9174. [2021-04-15 04:18:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9174 states, 9173 states have (on average 3.3408917475198954) internal successors, (30646), 9173 states have internal predecessors, (30646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9174 states to 9174 states and 30646 transitions. [2021-04-15 04:18:15,383 INFO L78 Accepts]: Start accepts. Automaton has 9174 states and 30646 transitions. Word has length 36 [2021-04-15 04:18:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:18:15,384 INFO L480 AbstractCegarLoop]: Abstraction has 9174 states and 30646 transitions. [2021-04-15 04:18:15,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9174 states and 30646 transitions. [2021-04-15 04:18:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:18:15,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:18:15,400 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:18:15,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:15,601 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:18:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:18:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2016343163, now seen corresponding path program 59 times [2021-04-15 04:18:15,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:18:15,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615858648] [2021-04-15 04:18:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:18:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:18:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:18:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615858648] [2021-04-15 04:18:16,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067913959] [2021-04-15 04:18:16,402 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:16,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:18:16,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:18:16,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:18:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:18:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:18,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:18:18,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-04-15 04:18:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135293358] [2021-04-15 04:18:18,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:18:18,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:18:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:18:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:18:18,349 INFO L87 Difference]: Start difference. First operand 9174 states and 30646 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:21,290 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 04:18:21,847 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:18:22,018 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 04:18:22,642 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-04-15 04:18:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:18:23,011 INFO L93 Difference]: Finished difference Result 9826 states and 32390 transitions. [2021-04-15 04:18:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:18:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:18:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:18:23,042 INFO L225 Difference]: With dead ends: 9826 [2021-04-15 04:18:23,043 INFO L226 Difference]: Without dead ends: 9630 [2021-04-15 04:18:23,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 4535.8ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 04:18:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2021-04-15 04:18:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 9118. [2021-04-15 04:18:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9118 states, 9117 states have (on average 3.345179335307667) internal successors, (30498), 9117 states have internal predecessors, (30498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9118 states to 9118 states and 30498 transitions. [2021-04-15 04:18:23,391 INFO L78 Accepts]: Start accepts. Automaton has 9118 states and 30498 transitions. Word has length 36 [2021-04-15 04:18:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:18:23,391 INFO L480 AbstractCegarLoop]: Abstraction has 9118 states and 30498 transitions. [2021-04-15 04:18:23,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9118 states and 30498 transitions. [2021-04-15 04:18:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:18:23,408 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:18:23,408 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:18:23,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-04-15 04:18:23,613 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:18:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:18:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash 395923585, now seen corresponding path program 60 times [2021-04-15 04:18:23,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:18:23,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563708641] [2021-04-15 04:18:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:18:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:18:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:24,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563708641] [2021-04-15 04:18:24,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576662455] [2021-04-15 04:18:24,640 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:24,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:18:24,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:18:24,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:18:24,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:18:26,856 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-04-15 04:18:27,231 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:18:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:27,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:18:27,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-04-15 04:18:27,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231837924] [2021-04-15 04:18:27,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:18:27,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:18:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:18:27,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:18:27,553 INFO L87 Difference]: Start difference. First operand 9118 states and 30498 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:28,365 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:18:32,577 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:18:33,531 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 04:18:34,153 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-04-15 04:18:34,608 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-04-15 04:18:35,231 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-04-15 04:18:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:18:36,235 INFO L93 Difference]: Finished difference Result 9932 states and 32713 transitions. [2021-04-15 04:18:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 04:18:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:18:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:18:36,269 INFO L225 Difference]: With dead ends: 9932 [2021-04-15 04:18:36,269 INFO L226 Difference]: Without dead ends: 9818 [2021-04-15 04:18:36,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 6400.5ms TimeCoverageRelationStatistics Valid=419, Invalid=2337, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 04:18:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9818 states. [2021-04-15 04:18:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9818 to 9214. [2021-04-15 04:18:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9214 states, 9213 states have (on average 3.338977531748616) internal successors, (30762), 9213 states have internal predecessors, (30762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9214 states to 9214 states and 30762 transitions. [2021-04-15 04:18:36,536 INFO L78 Accepts]: Start accepts. Automaton has 9214 states and 30762 transitions. Word has length 36 [2021-04-15 04:18:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:18:36,537 INFO L480 AbstractCegarLoop]: Abstraction has 9214 states and 30762 transitions. [2021-04-15 04:18:36,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 9214 states and 30762 transitions. [2021-04-15 04:18:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:18:36,558 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:18:36,558 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:18:36,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:36,758 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:18:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:18:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash -442003583, now seen corresponding path program 61 times [2021-04-15 04:18:36,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:18:36,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986681594] [2021-04-15 04:18:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:18:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:18:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:37,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986681594] [2021-04-15 04:18:37,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147836791] [2021-04-15 04:18:37,905 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:18:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:18:37,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:18:39,333 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 04:18:39,844 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:18:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:40,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:18:40,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-04-15 04:18:40,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443838783] [2021-04-15 04:18:40,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:18:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:18:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:18:40,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:18:40,572 INFO L87 Difference]: Start difference. First operand 9214 states and 30762 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:41,598 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:18:44,663 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-04-15 04:18:45,036 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 04:18:45,347 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:18:45,723 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:18:45,995 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 04:18:46,572 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-04-15 04:18:46,844 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-04-15 04:18:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:18:47,115 INFO L93 Difference]: Finished difference Result 10128 states and 33258 transitions. [2021-04-15 04:18:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:18:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:18:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:18:47,148 INFO L225 Difference]: With dead ends: 10128 [2021-04-15 04:18:47,148 INFO L226 Difference]: Without dead ends: 9948 [2021-04-15 04:18:47,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 6206.6ms TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:18:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9948 states. [2021-04-15 04:18:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9948 to 9158. [2021-04-15 04:18:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9158 states, 9157 states have (on average 3.3441083324232825) internal successors, (30622), 9157 states have internal predecessors, (30622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9158 states to 9158 states and 30622 transitions. [2021-04-15 04:18:47,415 INFO L78 Accepts]: Start accepts. Automaton has 9158 states and 30622 transitions. Word has length 36 [2021-04-15 04:18:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:18:47,416 INFO L480 AbstractCegarLoop]: Abstraction has 9158 states and 30622 transitions. [2021-04-15 04:18:47,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9158 states and 30622 transitions. [2021-04-15 04:18:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:18:47,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:18:47,436 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:18:47,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-04-15 04:18:47,637 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:18:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:18:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1069723269, now seen corresponding path program 62 times [2021-04-15 04:18:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:18:47,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428083202] [2021-04-15 04:18:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:18:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:18:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:49,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428083202] [2021-04-15 04:18:49,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756260899] [2021-04-15 04:18:49,250 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:18:49,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:18:49,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:18:49,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:18:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:18:50,441 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:18:50,896 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 04:18:51,394 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 04:18:51,859 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:18:52,415 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:18:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:18:52,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:18:52,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-04-15 04:18:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836447751] [2021-04-15 04:18:52,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:18:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:18:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:18:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:18:52,662 INFO L87 Difference]: Start difference. First operand 9158 states and 30622 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:18:53,359 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:18:53,640 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-04-15 04:18:53,920 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:18:54,211 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-04-15 04:18:54,484 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 04:18:54,707 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 04:18:55,308 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:18:55,470 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-04-15 04:18:56,202 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:18:56,625 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-04-15 04:18:56,802 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:18:57,669 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-04-15 04:18:57,895 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-04-15 04:18:58,598 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-04-15 04:18:58,812 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-04-15 04:18:59,541 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-04-15 04:18:59,844 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-04-15 04:19:00,297 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-04-15 04:19:00,628 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-04-15 04:19:00,932 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-04-15 04:19:01,285 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-04-15 04:19:01,583 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-04-15 04:19:01,906 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:19:02,283 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-04-15 04:19:02,550 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:19:03,264 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-04-15 04:19:03,628 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-04-15 04:19:03,841 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:19:04,848 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-04-15 04:19:05,393 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:19:05,970 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 04:19:06,248 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-04-15 04:19:06,934 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-04-15 04:19:07,661 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 04:19:08,061 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-04-15 04:19:08,495 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 04:19:08,708 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:19:09,007 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:19:09,715 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:19:10,184 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-04-15 04:19:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:19:11,747 INFO L93 Difference]: Finished difference Result 15178 states and 48478 transitions. [2021-04-15 04:19:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-04-15 04:19:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:19:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:19:11,790 INFO L225 Difference]: With dead ends: 15178 [2021-04-15 04:19:11,790 INFO L226 Difference]: Without dead ends: 15037 [2021-04-15 04:19:11,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 15271.2ms TimeCoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2021-04-15 04:19:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15037 states. [2021-04-15 04:19:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15037 to 9252. [2021-04-15 04:19:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9252 states, 9251 states have (on average 3.3429899470327533) internal successors, (30926), 9251 states have internal predecessors, (30926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:19:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9252 states to 9252 states and 30926 transitions. [2021-04-15 04:19:12,052 INFO L78 Accepts]: Start accepts. Automaton has 9252 states and 30926 transitions. Word has length 36 [2021-04-15 04:19:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:19:12,052 INFO L480 AbstractCegarLoop]: Abstraction has 9252 states and 30926 transitions. [2021-04-15 04:19:12,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:19:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states and 30926 transitions. [2021-04-15 04:19:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:19:12,071 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:19:12,071 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:19:12,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-04-15 04:19:12,272 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:19:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:19:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1526930565, now seen corresponding path program 63 times [2021-04-15 04:19:12,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:19:12,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398471500] [2021-04-15 04:19:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:19:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:19:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:19:13,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398471500] [2021-04-15 04:19:13,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476405295] [2021-04-15 04:19:13,302 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:19:13,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:19:13,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:19:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:19:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:19:15,252 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 04:19:15,857 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:19:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:19:16,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:19:16,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-04-15 04:19:16,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224987071] [2021-04-15 04:19:16,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:19:16,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:19:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:19:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:19:16,105 INFO L87 Difference]: Start difference. First operand 9252 states and 30926 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:19:16,652 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:19:16,981 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:19:17,824 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:19:18,337 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:19:19,260 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:19:19,638 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:19:21,605 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:19:22,071 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:19:23,488 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:19:23,994 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:19:24,315 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:19:24,833 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-04-15 04:19:25,897 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:19:26,366 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:19:26,733 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:19:27,089 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:19:27,461 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:19:27,870 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-04-15 04:19:28,997 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:19:29,281 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 04:19:30,029 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:19:30,243 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:19:30,512 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:19:30,837 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:19:31,349 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 04:19:31,675 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-04-15 04:19:32,210 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 04:19:32,653 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:19:33,481 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-04-15 04:19:34,345 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 04:19:35,076 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-04-15 04:19:35,418 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-04-15 04:19:36,035 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:19:36,422 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 04:19:36,774 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 04:19:37,391 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-04-15 04:19:37,972 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-04-15 04:19:38,640 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-04-15 04:19:39,065 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-04-15 04:19:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:19:41,360 INFO L93 Difference]: Finished difference Result 14091 states and 45143 transitions. [2021-04-15 04:19:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-04-15 04:19:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:19:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:19:41,411 INFO L225 Difference]: With dead ends: 14091 [2021-04-15 04:19:41,411 INFO L226 Difference]: Without dead ends: 13810 [2021-04-15 04:19:41,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 15414.9ms TimeCoverageRelationStatistics Valid=1018, Invalid=8294, Unknown=0, NotChecked=0, Total=9312 [2021-04-15 04:19:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13810 states. [2021-04-15 04:19:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13810 to 9238. [2021-04-15 04:19:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9238 states, 9237 states have (on average 3.3454584821911877) internal successors, (30902), 9237 states have internal predecessors, (30902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:19:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9238 states to 9238 states and 30902 transitions. [2021-04-15 04:19:41,737 INFO L78 Accepts]: Start accepts. Automaton has 9238 states and 30902 transitions. Word has length 36 [2021-04-15 04:19:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:19:41,737 INFO L480 AbstractCegarLoop]: Abstraction has 9238 states and 30902 transitions. [2021-04-15 04:19:41,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:19:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 9238 states and 30902 transitions. [2021-04-15 04:19:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:19:41,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:19:41,760 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:19:41,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-04-15 04:19:41,961 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:19:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:19:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1653259387, now seen corresponding path program 64 times [2021-04-15 04:19:41,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:19:41,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462330431] [2021-04-15 04:19:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:19:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:19:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:19:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462330431] [2021-04-15 04:19:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137355057] [2021-04-15 04:19:43,534 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:19:43,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:19:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:19:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:19:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:19:45,277 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-04-15 04:19:45,703 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:19:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:19:46,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:19:46,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-04-15 04:19:46,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926951418] [2021-04-15 04:19:46,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:19:46,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:19:46,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:19:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:19:46,648 INFO L87 Difference]: Start difference. First operand 9238 states and 30902 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:19:47,373 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-04-15 04:19:47,792 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 04:19:48,026 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:19:48,372 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:19:48,550 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:19:48,956 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:19:49,252 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:19:49,653 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:19:50,178 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:19:50,763 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-04-15 04:19:51,148 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:19:51,566 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:19:52,047 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:19:52,309 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-04-15 04:19:52,761 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:19:53,068 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:19:53,537 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 04:19:54,610 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:19:54,798 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-04-15 04:19:55,445 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-04-15 04:19:56,064 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:19:56,493 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:19:56,878 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 04:19:57,562 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:19:58,814 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:19:59,763 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:00,068 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:20:00,589 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:20:00,833 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-04-15 04:20:01,138 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:01,671 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:20:02,339 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 04:20:03,057 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:20:05,346 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-04-15 04:20:06,046 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 04:20:06,922 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:20:07,300 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 04:20:08,375 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-04-15 04:20:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:20:08,899 INFO L93 Difference]: Finished difference Result 15938 states and 50729 transitions. [2021-04-15 04:20:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-04-15 04:20:08,904 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:20:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:20:08,957 INFO L225 Difference]: With dead ends: 15938 [2021-04-15 04:20:08,957 INFO L226 Difference]: Without dead ends: 15666 [2021-04-15 04:20:08,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 15803.0ms TimeCoverageRelationStatistics Valid=1131, Invalid=6879, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:20:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15666 states. [2021-04-15 04:20:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15666 to 9252. [2021-04-15 04:20:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9252 states, 9251 states have (on average 3.343638525564804) internal successors, (30932), 9251 states have internal predecessors, (30932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:20:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9252 states to 9252 states and 30932 transitions. [2021-04-15 04:20:09,286 INFO L78 Accepts]: Start accepts. Automaton has 9252 states and 30932 transitions. Word has length 36 [2021-04-15 04:20:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:20:09,286 INFO L480 AbstractCegarLoop]: Abstraction has 9252 states and 30932 transitions. [2021-04-15 04:20:09,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:20:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9252 states and 30932 transitions. [2021-04-15 04:20:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:20:09,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:20:09,306 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:20:09,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:20:09,507 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:20:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:20:09,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1349684095, now seen corresponding path program 65 times [2021-04-15 04:20:09,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:20:09,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112930089] [2021-04-15 04:20:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:20:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:20:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:20:11,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112930089] [2021-04-15 04:20:11,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884743516] [2021-04-15 04:20:11,026 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:20:11,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:20:11,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:20:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:20:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:20:12,850 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-04-15 04:20:13,306 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:20:14,588 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 04:20:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:20:14,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:20:14,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-04-15 04:20:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755051959] [2021-04-15 04:20:14,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:20:14,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:20:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:20:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:20:14,869 INFO L87 Difference]: Start difference. First operand 9252 states and 30932 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:20:15,466 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-04-15 04:20:15,938 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 04:20:16,162 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:20:16,517 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:20:16,737 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:20:17,084 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:17,381 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:20:17,793 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:20:17,994 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:20:18,355 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:20:18,836 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-04-15 04:20:19,117 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:20:19,435 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:20:19,826 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:20:20,079 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-04-15 04:20:20,493 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:20:20,829 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:20:21,148 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:20:21,665 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:20:21,918 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2021-04-15 04:20:22,988 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:20:23,177 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-04-15 04:20:23,814 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-04-15 04:20:24,115 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-04-15 04:20:24,450 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:20:24,947 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:20:25,286 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 04:20:25,947 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:20:26,245 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:20:27,491 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-04-15 04:20:27,831 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-04-15 04:20:28,072 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:20:28,720 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:29,047 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:20:29,753 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:20:30,038 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-04-15 04:20:30,318 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:30,810 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:20:31,388 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 04:20:32,444 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:32,747 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:20:33,118 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:20:34,483 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:35,087 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:20:35,831 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-04-15 04:20:36,676 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-04-15 04:20:38,820 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-04-15 04:20:39,916 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 04:20:40,914 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:20:41,356 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 04:20:42,531 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-04-15 04:20:42,805 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-04-15 04:20:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:20:43,267 INFO L93 Difference]: Finished difference Result 16665 states and 52893 transitions. [2021-04-15 04:20:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-04-15 04:20:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:20:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:20:43,337 INFO L225 Difference]: With dead ends: 16665 [2021-04-15 04:20:43,338 INFO L226 Difference]: Without dead ends: 16417 [2021-04-15 04:20:43,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3251 ImplicationChecksByTransitivity, 19956.3ms TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2021-04-15 04:20:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16417 states. [2021-04-15 04:20:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16417 to 9287. [2021-04-15 04:20:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9287 states, 9286 states have (on average 3.3427740684902) internal successors, (31041), 9286 states have internal predecessors, (31041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:20:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9287 states to 9287 states and 31041 transitions. [2021-04-15 04:20:43,719 INFO L78 Accepts]: Start accepts. Automaton has 9287 states and 31041 transitions. Word has length 36 [2021-04-15 04:20:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:20:43,719 INFO L480 AbstractCegarLoop]: Abstraction has 9287 states and 31041 transitions. [2021-04-15 04:20:43,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:20:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9287 states and 31041 transitions. [2021-04-15 04:20:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:20:43,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:20:43,742 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:20:43,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:20:43,944 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:20:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:20:43,944 INFO L82 PathProgramCache]: Analyzing trace with hash 834262405, now seen corresponding path program 66 times [2021-04-15 04:20:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:20:43,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472231224] [2021-04-15 04:20:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:20:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:20:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:20:45,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472231224] [2021-04-15 04:20:45,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753990979] [2021-04-15 04:20:45,727 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:20:45,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 04:20:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:20:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:20:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:20:47,589 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-04-15 04:20:48,054 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:20:48,764 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:20:49,133 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:20:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:20:49,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:20:49,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-04-15 04:20:49,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681111294] [2021-04-15 04:20:49,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:20:49,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:20:49,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:20:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:20:49,459 INFO L87 Difference]: Start difference. First operand 9287 states and 31041 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:20:50,265 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-04-15 04:20:50,699 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 04:20:51,007 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:20:51,452 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:20:51,708 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:20:52,217 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:20:52,640 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:20:53,085 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:20:53,415 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:20:53,926 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-04-15 04:20:54,265 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:20:54,561 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:20:55,051 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:20:55,583 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:20:56,003 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:20:56,310 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:20:56,533 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:20:56,876 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-04-15 04:20:57,441 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 04:20:57,953 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-04-15 04:20:58,242 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:20:58,615 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-04-15 04:20:59,011 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:20:59,415 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:20:59,788 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 04:20:59,981 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:21:00,335 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:21:00,667 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:21:01,008 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:21:01,496 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-04-15 04:21:02,069 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:21:02,771 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-04-15 04:21:03,279 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:21:03,603 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:21:03,913 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:21:05,059 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:21:05,583 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 04:21:06,491 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:21:06,842 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:21:07,167 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:21:07,550 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:21:08,978 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 04:21:09,601 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-04-15 04:21:10,482 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-04-15 04:21:12,106 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:21:12,590 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:21:13,418 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 04:21:13,937 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:21:14,882 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:21:15,333 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:21:15,948 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 04:21:16,544 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-04-15 04:21:17,432 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-04-15 04:21:18,125 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 04:21:18,874 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-04-15 04:21:19,687 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-04-15 04:21:21,084 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 04:21:21,884 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:21:23,569 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-04-15 04:21:24,475 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-04-15 04:21:24,962 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-04-15 04:21:26,463 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-04-15 04:21:27,163 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-04-15 04:21:28,138 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-04-15 04:21:29,018 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-04-15 04:21:30,175 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-04-15 04:21:31,103 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-04-15 04:21:32,250 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 04:21:33,205 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-04-15 04:21:36,672 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2021-04-15 04:21:37,166 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-04-15 04:21:38,303 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:21:38,538 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2021-04-15 04:21:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:21:38,885 INFO L93 Difference]: Finished difference Result 18009 states and 56792 transitions. [2021-04-15 04:21:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-04-15 04:21:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:21:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:21:38,951 INFO L225 Difference]: With dead ends: 18009 [2021-04-15 04:21:38,952 INFO L226 Difference]: Without dead ends: 17826 [2021-04-15 04:21:38,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 32068.0ms TimeCoverageRelationStatistics Valid=1975, Invalid=11597, Unknown=0, NotChecked=0, Total=13572 [2021-04-15 04:21:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2021-04-15 04:21:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 9281. [2021-04-15 04:21:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9280 states have (on average 3.3435344827586206) internal successors, (31028), 9280 states have internal predecessors, (31028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:21:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 31028 transitions. [2021-04-15 04:21:39,327 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 31028 transitions. Word has length 36 [2021-04-15 04:21:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:21:39,327 INFO L480 AbstractCegarLoop]: Abstraction has 9281 states and 31028 transitions. [2021-04-15 04:21:39,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:21:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 31028 transitions. [2021-04-15 04:21:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:21:39,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:21:39,347 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:21:39,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-04-15 04:21:39,548 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:21:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:21:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1859598719, now seen corresponding path program 67 times [2021-04-15 04:21:39,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:21:39,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710078109] [2021-04-15 04:21:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:21:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:21:40,363 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-04-15 04:21:41,429 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-04-15 04:21:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:21:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710078109] [2021-04-15 04:21:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085696167] [2021-04-15 04:21:41,521 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:21:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:21:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:21:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:21:43,242 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-04-15 04:21:44,158 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:21:44,583 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:21:45,139 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:21:45,668 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:21:45,986 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:21:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:21:46,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:21:46,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-04-15 04:21:46,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371157023] [2021-04-15 04:21:46,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:21:46,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:21:46,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:21:46,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:21:46,102 INFO L87 Difference]: Start difference. First operand 9281 states and 31028 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:21:46,684 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:21:47,076 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 04:21:47,880 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:21:48,084 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:21:48,390 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:21:48,808 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:21:49,439 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:21:49,611 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:21:49,837 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-04-15 04:21:50,255 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:21:50,918 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:21:51,103 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-04-15 04:21:51,926 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:21:52,452 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:21:52,703 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:21:53,605 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-04-15 04:21:55,458 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:21:56,111 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-04-15 04:21:57,448 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 04:21:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:21:58,200 INFO L93 Difference]: Finished difference Result 13836 states and 44443 transitions. [2021-04-15 04:21:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:21:58,207 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:21:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:21:58,258 INFO L225 Difference]: With dead ends: 13836 [2021-04-15 04:21:58,258 INFO L226 Difference]: Without dead ends: 13755 [2021-04-15 04:21:58,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 11708.1ms TimeCoverageRelationStatistics Valid=630, Invalid=3152, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:21:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13755 states. [2021-04-15 04:21:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13755 to 9331. [2021-04-15 04:21:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9331 states, 9330 states have (on average 3.341907824222937) internal successors, (31180), 9330 states have internal predecessors, (31180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:21:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9331 states to 9331 states and 31180 transitions. [2021-04-15 04:21:58,574 INFO L78 Accepts]: Start accepts. Automaton has 9331 states and 31180 transitions. Word has length 36 [2021-04-15 04:21:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:21:58,574 INFO L480 AbstractCegarLoop]: Abstraction has 9331 states and 31180 transitions. [2021-04-15 04:21:58,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:21:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9331 states and 31180 transitions. [2021-04-15 04:21:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:21:58,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:21:58,599 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:21:58,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-04-15 04:21:58,800 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:21:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:21:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1597441409, now seen corresponding path program 68 times [2021-04-15 04:21:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:21:58,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269815191] [2021-04-15 04:21:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:21:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:21:59,714 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-04-15 04:22:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:22:01,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269815191] [2021-04-15 04:22:01,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12853441] [2021-04-15 04:22:01,237 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:22:01,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:22:01,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:22:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:22:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:22:02,785 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-04-15 04:22:03,733 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 04:22:04,324 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:22:04,776 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:22:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:22:05,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:22:05,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-04-15 04:22:05,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215267192] [2021-04-15 04:22:05,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:22:05,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:22:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:22:05,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:22:05,189 INFO L87 Difference]: Start difference. First operand 9331 states and 31180 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:22:06,344 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 04:22:06,920 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 04:22:07,199 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:22:07,825 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:22:08,415 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:22:08,672 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:22:09,082 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:22:09,653 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:22:09,946 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:22:10,466 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:22:11,089 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:22:11,737 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:22:12,030 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:22:12,352 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-04-15 04:22:12,901 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:22:13,867 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:22:14,092 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-04-15 04:22:14,844 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-04-15 04:22:15,360 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:22:15,992 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:22:17,678 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-04-15 04:22:17,945 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-04-15 04:22:18,206 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:22:18,569 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:22:18,887 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:22:19,335 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:22:19,838 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:22:20,464 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-04-15 04:22:22,180 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:22:22,885 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:22:23,646 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:22:24,401 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:22:25,104 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-04-15 04:22:25,936 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 04:22:26,963 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-04-15 04:22:27,616 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:22:28,352 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:22:28,789 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 04:22:30,083 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:22:30,526 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:22:30,972 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:22:31,602 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-04-15 04:22:32,137 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-04-15 04:22:33,112 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 04:22:33,653 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 04:22:34,395 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 04:22:35,145 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:22:36,265 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:22:37,257 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-04-15 04:22:40,391 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 04:22:41,213 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-04-15 04:22:41,761 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-04-15 04:22:43,009 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:22:43,747 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 04:22:44,405 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 04:22:46,608 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-04-15 04:22:47,525 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-04-15 04:22:48,554 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-04-15 04:22:49,266 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-04-15 04:22:50,457 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-04-15 04:22:50,676 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:22:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:22:53,185 INFO L93 Difference]: Finished difference Result 14523 states and 46440 transitions. [2021-04-15 04:22:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-04-15 04:22:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:22:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:22:53,243 INFO L225 Difference]: With dead ends: 14523 [2021-04-15 04:22:53,243 INFO L226 Difference]: Without dead ends: 14282 [2021-04-15 04:22:53,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 28776.0ms TimeCoverageRelationStatistics Valid=1075, Invalid=8627, Unknown=0, NotChecked=0, Total=9702 [2021-04-15 04:22:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14282 states. [2021-04-15 04:22:53,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14282 to 9289. [2021-04-15 04:22:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9289 states, 9288 states have (on average 3.346683893195521) internal successors, (31084), 9288 states have internal predecessors, (31084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:22:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9289 states to 9289 states and 31084 transitions. [2021-04-15 04:22:53,546 INFO L78 Accepts]: Start accepts. Automaton has 9289 states and 31084 transitions. Word has length 36 [2021-04-15 04:22:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:22:53,547 INFO L480 AbstractCegarLoop]: Abstraction has 9289 states and 31084 transitions. [2021-04-15 04:22:53,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:22:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9289 states and 31084 transitions. [2021-04-15 04:22:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:22:53,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:22:53,570 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:22:53,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:22:53,771 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:22:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:22:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2037565823, now seen corresponding path program 69 times [2021-04-15 04:22:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:22:53,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511356150] [2021-04-15 04:22:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:22:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:22:55,166 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:22:55,375 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-04-15 04:22:55,562 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 04:22:55,982 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-04-15 04:22:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:22:56,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511356150] [2021-04-15 04:22:56,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924619789] [2021-04-15 04:22:56,090 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:22:56,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:22:56,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:22:56,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:22:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:22:58,005 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-04-15 04:22:58,695 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:22:59,463 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-04-15 04:23:00,174 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:23:00,503 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:23:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:23:00,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:23:00,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-04-15 04:23:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326427383] [2021-04-15 04:23:00,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 04:23:00,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:23:00,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 04:23:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:23:00,615 INFO L87 Difference]: Start difference. First operand 9289 states and 31084 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:23:01,279 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:23:01,748 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 04:23:02,704 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:23:02,933 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-04-15 04:23:03,299 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:23:03,831 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:23:04,410 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-04-15 04:23:04,730 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-04-15 04:23:05,223 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:23:05,561 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:23:05,897 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-04-15 04:23:06,456 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:23:07,369 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:23:07,626 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-04-15 04:23:08,506 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:23:09,033 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:23:09,706 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:23:10,016 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:23:10,263 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-04-15 04:23:10,669 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:23:11,852 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-04-15 04:23:12,179 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:23:12,453 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:23:13,414 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:23:14,054 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:23:14,735 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-04-15 04:23:16,645 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 04:23:17,848 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 04:23:18,674 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:23:20,854 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-04-15 04:23:21,550 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 04:23:22,137 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:23:23,193 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-04-15 04:23:24,823 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:23:25,647 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 04:23:26,348 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 04:23:27,013 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 04:23:27,628 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 04:23:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:23:30,891 INFO L93 Difference]: Finished difference Result 15079 states and 48196 transitions. [2021-04-15 04:23:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 04:23:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:23:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:23:30,956 INFO L225 Difference]: With dead ends: 15079 [2021-04-15 04:23:30,957 INFO L226 Difference]: Without dead ends: 14965 [2021-04-15 04:23:30,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 20638.4ms TimeCoverageRelationStatistics Valid=863, Invalid=5143, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 04:23:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14965 states. [2021-04-15 04:23:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14965 to 9303. [2021-04-15 04:23:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 3.3478821758761557) internal successors, (31142), 9302 states have internal predecessors, (31142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:23:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 31142 transitions. [2021-04-15 04:23:31,353 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 31142 transitions. Word has length 36 [2021-04-15 04:23:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:23:31,353 INFO L480 AbstractCegarLoop]: Abstraction has 9303 states and 31142 transitions. [2021-04-15 04:23:31,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:23:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 31142 transitions. [2021-04-15 04:23:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:23:31,379 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:23:31,379 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:23:31,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:23:31,580 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:23:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:23:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash 537469825, now seen corresponding path program 70 times [2021-04-15 04:23:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:23:31,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424727414] [2021-04-15 04:23:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:23:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:23:32,261 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-04-15 04:23:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:23:33,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424727414] [2021-04-15 04:23:33,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535990714] [2021-04-15 04:23:33,690 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:23:33,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:23:33,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:23:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:23:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:23:35,935 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-04-15 04:23:36,740 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:23:37,718 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:23:38,181 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:23:38,589 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 04:23:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:23:39,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:23:39,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-04-15 04:23:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710612765] [2021-04-15 04:23:39,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:23:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:23:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:23:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:23:39,036 INFO L87 Difference]: Start difference. First operand 9303 states and 31142 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:23:40,144 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:23:40,775 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 04:23:41,485 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:23:42,021 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-04-15 04:23:42,367 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:23:42,915 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:23:43,629 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:23:44,159 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-04-15 04:23:44,493 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:23:45,048 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:23:45,528 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-04-15 04:23:45,772 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:23:46,216 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:23:46,665 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:23:47,075 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:23:47,261 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:23:47,873 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:23:48,358 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-04-15 04:23:49,252 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:23:49,940 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 04:23:50,271 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:23:50,736 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 04:23:51,222 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:23:51,613 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:23:52,165 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:23:52,557 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:23:53,017 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 04:23:54,033 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 04:23:54,806 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:23:55,646 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:23:56,088 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:23:56,612 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:23:57,236 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-04-15 04:23:57,605 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:23:58,260 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 04:23:58,917 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-04-15 04:24:00,560 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:24:01,103 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:24:01,606 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:24:02,777 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:24:03,516 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 04:24:04,164 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 04:24:05,350 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-04-15 04:24:07,499 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:24:08,390 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:24:08,991 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 04:24:09,865 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:24:11,040 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 04:24:12,040 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-04-15 04:24:13,099 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-04-15 04:24:14,228 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:24:15,697 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 04:24:16,602 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-04-15 04:24:17,195 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 04:24:17,673 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-04-15 04:24:19,186 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-04-15 04:24:20,577 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-04-15 04:24:21,963 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-04-15 04:24:22,920 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 04:24:23,906 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-04-15 04:24:24,350 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-04-15 04:24:27,308 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:24:27,516 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-04-15 04:24:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:24:27,676 INFO L93 Difference]: Finished difference Result 18181 states and 57434 transitions. [2021-04-15 04:24:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-04-15 04:24:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:24:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:24:27,746 INFO L225 Difference]: With dead ends: 18181 [2021-04-15 04:24:27,747 INFO L226 Difference]: Without dead ends: 18009 [2021-04-15 04:24:27,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3234 ImplicationChecksByTransitivity, 33543.7ms TimeCoverageRelationStatistics Valid=1708, Invalid=8392, Unknown=0, NotChecked=0, Total=10100 [2021-04-15 04:24:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-04-15 04:24:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 9303. [2021-04-15 04:24:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 3.3478821758761557) internal successors, (31142), 9302 states have internal predecessors, (31142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:24:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 31142 transitions. [2021-04-15 04:24:28,162 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 31142 transitions. Word has length 36 [2021-04-15 04:24:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:24:28,162 INFO L480 AbstractCegarLoop]: Abstraction has 9303 states and 31142 transitions. [2021-04-15 04:24:28,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:24:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 31142 transitions. [2021-04-15 04:24:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:24:28,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:24:28,186 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:24:28,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:24:28,388 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:24:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:24:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash -468984019, now seen corresponding path program 71 times [2021-04-15 04:24:28,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:24:28,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241072298] [2021-04-15 04:24:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:24:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:24:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:24:30,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241072298] [2021-04-15 04:24:30,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960169477] [2021-04-15 04:24:30,679 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:24:30,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:24:30,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:24:30,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 04:24:30,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:24:33,387 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:24:34,050 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 04:24:34,862 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 04:24:35,427 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:24:35,746 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:24:36,485 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:24:36,886 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:24:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:24:37,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:24:37,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-04-15 04:24:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397546120] [2021-04-15 04:24:37,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:24:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:24:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:24:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:24:37,020 INFO L87 Difference]: Start difference. First operand 9303 states and 31142 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:24:38,002 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 04:24:38,925 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-04-15 04:24:39,754 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-04-15 04:24:40,083 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-04-15 04:24:40,717 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:24:42,162 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:24:42,503 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-04-15 04:24:43,371 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-04-15 04:24:43,746 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-04-15 04:24:44,635 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:24:44,807 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-04-15 04:24:45,609 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-04-15 04:24:46,223 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:24:46,779 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 04:24:47,848 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:24:48,474 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-04-15 04:24:49,423 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-04-15 04:24:49,879 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:24:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:24:50,813 INFO L93 Difference]: Finished difference Result 12753 states and 41745 transitions. [2021-04-15 04:24:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:24:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:24:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:24:50,860 INFO L225 Difference]: With dead ends: 12753 [2021-04-15 04:24:50,860 INFO L226 Difference]: Without dead ends: 12699 [2021-04-15 04:24:50,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 13114.3ms TimeCoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:24:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12699 states. [2021-04-15 04:24:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12699 to 9371. [2021-04-15 04:24:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9371 states, 9370 states have (on average 3.344076840981857) internal successors, (31334), 9370 states have internal predecessors, (31334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:24:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9371 states to 9371 states and 31334 transitions. [2021-04-15 04:24:51,164 INFO L78 Accepts]: Start accepts. Automaton has 9371 states and 31334 transitions. Word has length 36 [2021-04-15 04:24:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:24:51,164 INFO L480 AbstractCegarLoop]: Abstraction has 9371 states and 31334 transitions. [2021-04-15 04:24:51,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:24:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 9371 states and 31334 transitions. [2021-04-15 04:24:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:24:51,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:24:51,184 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:24:51,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-04-15 04:24:51,385 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:24:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:24:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1306911187, now seen corresponding path program 72 times [2021-04-15 04:24:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:24:51,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686766810] [2021-04-15 04:24:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:24:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:24:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:24:53,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686766810] [2021-04-15 04:24:53,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478773665] [2021-04-15 04:24:53,212 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:24:53,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:24:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:24:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:24:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:24:55,147 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:24:55,976 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 04:24:56,932 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 04:24:57,520 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:24:58,305 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:24:58,663 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:24:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:24:58,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:24:58,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-04-15 04:24:58,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601769639] [2021-04-15 04:24:58,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:24:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:24:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:24:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:24:58,781 INFO L87 Difference]: Start difference. First operand 9371 states and 31334 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:00,024 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:25:00,637 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-04-15 04:25:01,146 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:25:01,689 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:25:02,134 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:25:02,525 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:25:02,958 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:25:04,227 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:25:04,981 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-04-15 04:25:05,858 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:25:06,526 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-04-15 04:25:08,432 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-04-15 04:25:09,466 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 04:25:10,017 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-04-15 04:25:10,955 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:25:12,099 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 04:25:13,679 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:25:14,561 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-04-15 04:25:15,186 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:25:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:25:16,456 INFO L93 Difference]: Finished difference Result 10675 states and 35073 transitions. [2021-04-15 04:25:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:25:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:25:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:25:16,495 INFO L225 Difference]: With dead ends: 10675 [2021-04-15 04:25:16,495 INFO L226 Difference]: Without dead ends: 10561 [2021-04-15 04:25:16,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 13145.5ms TimeCoverageRelationStatistics Valid=454, Invalid=2968, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:25:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-04-15 04:25:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9379. [2021-04-15 04:25:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.345915973555129) internal successors, (31378), 9378 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 31378 transitions. [2021-04-15 04:25:16,781 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 31378 transitions. Word has length 36 [2021-04-15 04:25:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:25:16,781 INFO L480 AbstractCegarLoop]: Abstraction has 9379 states and 31378 transitions. [2021-04-15 04:25:16,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 31378 transitions. [2021-04-15 04:25:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:25:16,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:25:16,801 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:25:17,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-04-15 04:25:17,002 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:25:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:25:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1927454253, now seen corresponding path program 73 times [2021-04-15 04:25:17,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:25:17,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118647708] [2021-04-15 04:25:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:25:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:25:18,769 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 04:25:19,177 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-04-15 04:25:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:25:19,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118647708] [2021-04-15 04:25:19,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311385386] [2021-04-15 04:25:19,283 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:25:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:25:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:25:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:25:21,670 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 04:25:22,176 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:25:22,637 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:25:23,273 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:25:23,842 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:25:24,175 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:25:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:25:24,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:25:24,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-04-15 04:25:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955930067] [2021-04-15 04:25:24,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:25:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:25:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:25:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:25:24,298 INFO L87 Difference]: Start difference. First operand 9379 states and 31378 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:25,615 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:25:26,113 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-04-15 04:25:28,045 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:25:29,223 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:25:31,345 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:25:31,878 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-04-15 04:25:32,970 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 04:25:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:25:33,982 INFO L93 Difference]: Finished difference Result 9938 states and 32819 transitions. [2021-04-15 04:25:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:25:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:25:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:25:34,015 INFO L225 Difference]: With dead ends: 9938 [2021-04-15 04:25:34,015 INFO L226 Difference]: Without dead ends: 9857 [2021-04-15 04:25:34,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 9267.4ms TimeCoverageRelationStatistics Valid=362, Invalid=2088, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:25:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2021-04-15 04:25:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 9411. [2021-04-15 04:25:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9411 states, 9410 states have (on average 3.343039319872476) internal successors, (31458), 9410 states have internal predecessors, (31458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9411 states to 9411 states and 31458 transitions. [2021-04-15 04:25:34,277 INFO L78 Accepts]: Start accepts. Automaton has 9411 states and 31458 transitions. Word has length 36 [2021-04-15 04:25:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:25:34,277 INFO L480 AbstractCegarLoop]: Abstraction has 9411 states and 31458 transitions. [2021-04-15 04:25:34,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 9411 states and 31458 transitions. [2021-04-15 04:25:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:25:34,298 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:25:34,298 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:25:34,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-04-15 04:25:34,499 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:25:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:25:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1089527085, now seen corresponding path program 74 times [2021-04-15 04:25:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:25:34,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457877288] [2021-04-15 04:25:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:25:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:25:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:25:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457877288] [2021-04-15 04:25:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732876621] [2021-04-15 04:25:36,131 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:25:36,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:25:36,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:25:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 04:25:36,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:25:38,259 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-04-15 04:25:38,894 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 04:25:39,661 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:25:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:25:39,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:25:39,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-04-15 04:25:39,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604079607] [2021-04-15 04:25:39,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:25:39,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:25:39,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:25:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:25:39,965 INFO L87 Difference]: Start difference. First operand 9411 states and 31458 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:25:41,349 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:25:42,001 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-04-15 04:25:42,606 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:25:43,261 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:25:44,152 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:25:45,190 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-04-15 04:25:46,735 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:25:47,043 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:25:47,820 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-04-15 04:25:48,814 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:25:49,283 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:25:50,109 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:25:51,096 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-04-15 04:25:52,343 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:25:52,777 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:25:53,181 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:25:53,944 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:25:54,848 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:25:55,575 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-04-15 04:25:56,334 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-04-15 04:25:57,484 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:25:58,181 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 04:25:58,877 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 04:25:59,793 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-04-15 04:26:01,077 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-04-15 04:26:01,619 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:26:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:02,261 INFO L93 Difference]: Finished difference Result 10570 states and 34675 transitions. [2021-04-15 04:26:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:26:02,268 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:26:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:02,302 INFO L225 Difference]: With dead ends: 10570 [2021-04-15 04:26:02,302 INFO L226 Difference]: Without dead ends: 10313 [2021-04-15 04:26:02,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 13202.4ms TimeCoverageRelationStatistics Valid=531, Invalid=3891, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:26:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10313 states. [2021-04-15 04:26:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10313 to 9371. [2021-04-15 04:26:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9371 states, 9370 states have (on average 3.3474919957310565) internal successors, (31366), 9370 states have internal predecessors, (31366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9371 states to 9371 states and 31366 transitions. [2021-04-15 04:26:02,583 INFO L78 Accepts]: Start accepts. Automaton has 9371 states and 31366 transitions. Word has length 36 [2021-04-15 04:26:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:02,583 INFO L480 AbstractCegarLoop]: Abstraction has 9371 states and 31366 transitions. [2021-04-15 04:26:02,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9371 states and 31366 transitions. [2021-04-15 04:26:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:26:02,606 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:02,607 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:02,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:02,807 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:02,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:02,808 INFO L82 PathProgramCache]: Analyzing trace with hash -162249171, now seen corresponding path program 75 times [2021-04-15 04:26:02,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:02,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82264456] [2021-04-15 04:26:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:04,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82264456] [2021-04-15 04:26:04,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235314386] [2021-04-15 04:26:04,775 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:04,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:26:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:26:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:06,899 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:26:07,744 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 04:26:08,378 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:26:09,365 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-04-15 04:26:09,976 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:26:10,348 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 04:26:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:10,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:10,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-04-15 04:26:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909480955] [2021-04-15 04:26:10,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:26:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:26:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:26:10,473 INFO L87 Difference]: Start difference. First operand 9371 states and 31366 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:11,110 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-04-15 04:26:11,717 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:26:12,347 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 04:26:12,764 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:26:12,991 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:26:13,520 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:26:13,884 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:26:14,260 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2021-04-15 04:26:14,710 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-04-15 04:26:15,445 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-04-15 04:26:15,703 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-04-15 04:26:16,076 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:26:16,307 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:26:16,501 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-04-15 04:26:16,985 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:26:17,302 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 04:26:17,589 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2021-04-15 04:26:17,991 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:26:18,366 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-04-15 04:26:19,033 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 04:26:19,476 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:26:19,759 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:26:20,242 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2021-04-15 04:26:20,559 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-04-15 04:26:21,035 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:26:21,408 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 04:26:21,923 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-04-15 04:26:22,218 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:26:22,717 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:26:23,575 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-04-15 04:26:24,024 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 04:26:24,295 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:26:25,007 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-04-15 04:26:25,412 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-04-15 04:26:25,698 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-04-15 04:26:26,415 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-04-15 04:26:27,074 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-04-15 04:26:27,929 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:26:28,261 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:26:28,531 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 04:26:28,921 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-04-15 04:26:29,254 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 04:26:29,750 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-04-15 04:26:30,077 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-04-15 04:26:30,460 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:26:31,042 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:26:32,123 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:26:32,663 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-04-15 04:26:33,600 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-04-15 04:26:34,181 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-04-15 04:26:34,532 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-04-15 04:26:35,675 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-04-15 04:26:36,115 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:26:37,270 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-04-15 04:26:37,747 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:26:38,130 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 04:26:38,660 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 04:26:39,045 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-04-15 04:26:39,472 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-04-15 04:26:40,360 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:26:40,848 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:26:41,466 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 04:26:41,790 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-04-15 04:26:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:43,268 INFO L93 Difference]: Finished difference Result 18675 states and 59884 transitions. [2021-04-15 04:26:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-04-15 04:26:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:26:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:43,309 INFO L225 Difference]: With dead ends: 18675 [2021-04-15 04:26:43,309 INFO L226 Difference]: Without dead ends: 18555 [2021-04-15 04:26:43,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 27470.1ms TimeCoverageRelationStatistics Valid=1454, Invalid=9052, Unknown=0, NotChecked=0, Total=10506 [2021-04-15 04:26:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18555 states. [2021-04-15 04:26:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18555 to 9399. [2021-04-15 04:26:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.347520749095552) internal successors, (31460), 9398 states have internal predecessors, (31460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 31460 transitions. [2021-04-15 04:26:43,540 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 31460 transitions. Word has length 36 [2021-04-15 04:26:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:43,540 INFO L480 AbstractCegarLoop]: Abstraction has 9399 states and 31460 transitions. [2021-04-15 04:26:43,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 31460 transitions. [2021-04-15 04:26:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:26:43,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:43,552 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:43,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-04-15 04:26:43,753 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash 712459565, now seen corresponding path program 76 times [2021-04-15 04:26:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:43,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615407645] [2021-04-15 04:26:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:26:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615407645] [2021-04-15 04:26:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985563688] [2021-04-15 04:26:45,134 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:45,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:26:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:26:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:26:45,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:26:47,053 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-04-15 04:26:47,392 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 04:26:47,771 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 04:26:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:26:47,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:26:47,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-04-15 04:26:47,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137537884] [2021-04-15 04:26:47,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:26:47,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:26:48,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:26:48,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:26:48,000 INFO L87 Difference]: Start difference. First operand 9399 states and 31460 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:48,684 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:26:49,658 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:26:50,723 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:26:51,170 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:26:51,409 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:26:51,567 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-04-15 04:26:51,902 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:26:53,085 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:26:54,622 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:26:55,005 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:26:56,640 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:26:57,477 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:26:57,902 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-04-15 04:26:58,581 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-04-15 04:26:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:26:58,973 INFO L93 Difference]: Finished difference Result 14845 states and 47581 transitions. [2021-04-15 04:26:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 04:26:58,976 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:26:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:26:59,002 INFO L225 Difference]: With dead ends: 14845 [2021-04-15 04:26:59,002 INFO L226 Difference]: Without dead ends: 14757 [2021-04-15 04:26:59,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 8859.6ms TimeCoverageRelationStatistics Valid=709, Invalid=4547, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:26:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-04-15 04:26:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 9415. [2021-04-15 04:26:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9415 states, 9414 states have (on average 3.3460803059273423) internal successors, (31500), 9414 states have internal predecessors, (31500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 31500 transitions. [2021-04-15 04:26:59,193 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 31500 transitions. Word has length 36 [2021-04-15 04:26:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:26:59,194 INFO L480 AbstractCegarLoop]: Abstraction has 9415 states and 31500 transitions. [2021-04-15 04:26:59,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:26:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 31500 transitions. [2021-04-15 04:26:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:26:59,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:26:59,207 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:26:59,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:26:59,407 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:26:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:26:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1314786259, now seen corresponding path program 77 times [2021-04-15 04:26:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:26:59,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73065552] [2021-04-15 04:26:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:26:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:00,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73065552] [2021-04-15 04:27:00,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943805610] [2021-04-15 04:27:00,814 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:00,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 04:27:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:00,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 04:27:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:02,851 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:27:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:03,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:03,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-04-15 04:27:03,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948857214] [2021-04-15 04:27:03,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:27:03,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:03,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:27:03,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:27:03,341 INFO L87 Difference]: Start difference. First operand 9415 states and 31500 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,873 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:27:04,752 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-04-15 04:27:04,955 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:27:05,701 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-04-15 04:27:06,076 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:27:06,482 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:27:06,898 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-04-15 04:27:07,117 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:27:07,732 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:27:08,525 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:27:08,811 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:27:09,466 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-04-15 04:27:10,211 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:27:10,578 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:27:10,943 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-04-15 04:27:11,823 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:27:12,118 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 04:27:12,651 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 04:27:13,084 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:27:13,964 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-04-15 04:27:14,362 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 04:27:14,723 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:27:15,303 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-04-15 04:27:16,329 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:27:16,664 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 04:27:16,963 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:27:17,261 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 04:27:17,815 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 04:27:18,156 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 04:27:18,917 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 04:27:19,279 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-04-15 04:27:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:20,037 INFO L93 Difference]: Finished difference Result 15433 states and 49383 transitions. [2021-04-15 04:27:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-04-15 04:27:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:27:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:20,071 INFO L225 Difference]: With dead ends: 15433 [2021-04-15 04:27:20,071 INFO L226 Difference]: Without dead ends: 15344 [2021-04-15 04:27:20,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 13258.7ms TimeCoverageRelationStatistics Valid=994, Invalid=6316, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 04:27:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15344 states. [2021-04-15 04:27:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15344 to 9471. [2021-04-15 04:27:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9471 states, 9470 states have (on average 3.343611404435058) internal successors, (31664), 9470 states have internal predecessors, (31664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9471 states to 9471 states and 31664 transitions. [2021-04-15 04:27:20,325 INFO L78 Accepts]: Start accepts. Automaton has 9471 states and 31664 transitions. Word has length 36 [2021-04-15 04:27:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:20,325 INFO L480 AbstractCegarLoop]: Abstraction has 9471 states and 31664 transitions. [2021-04-15 04:27:20,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9471 states and 31664 transitions. [2021-04-15 04:27:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:27:20,339 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:20,339 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:20,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:20,540 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash -121728719, now seen corresponding path program 78 times [2021-04-15 04:27:20,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:20,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623216307] [2021-04-15 04:27:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:21,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623216307] [2021-04-15 04:27:21,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499128363] [2021-04-15 04:27:21,645 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:21,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 04:27:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:24,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:24,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-04-15 04:27:24,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520245211] [2021-04-15 04:27:24,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:27:24,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:24,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:27:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:27:24,168 INFO L87 Difference]: Start difference. First operand 9471 states and 31664 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,887 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 04:27:25,830 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:27:26,077 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-04-15 04:27:26,378 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:27:26,733 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:27:27,049 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-04-15 04:27:27,232 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:27:27,869 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:27:28,401 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:27:28,615 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:27:29,551 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 Received shutdown request... [2021-04-15 04:27:30,090 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-04-15 04:27:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:27:30,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable636 [2021-04-15 04:27:30,291 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 04:27:30,294 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 04:27:30,294 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:27:30 BasicIcfg [2021-04-15 04:27:30,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:27:30,295 INFO L168 Benchmark]: Toolchain (without parser) took 814080.30 ms. Allocated memory was 255.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 236.7 MB in the beginning and 790.5 MB in the end (delta: -553.8 MB). Peak memory consumption was 807.5 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:30,295 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:27:30,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.79 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:30,295 INFO L168 Benchmark]: Boogie Preprocessor took 24.20 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:27:30,295 INFO L168 Benchmark]: RCFGBuilder took 312.65 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 236.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:30,295 INFO L168 Benchmark]: TraceAbstraction took 813710.26 ms. Allocated memory was 255.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 236.2 MB in the beginning and 790.5 MB in the end (delta: -554.2 MB). Peak memory consumption was 806.8 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:30,296 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.79 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.20 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 312.65 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 236.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 813710.26 ms. Allocated memory was 255.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 236.2 MB in the beginning and 790.5 MB in the end (delta: -554.2 MB). Peak memory consumption was 806.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 78). Cancelled while BasicCegarLoop was constructing difference of abstraction (9471states) and FLOYD_HOARE automaton (currently 42 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 36ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 813583.2ms, OverallIterations: 81, TraceHistogramMax: 4, EmptinessCheckTime: 1117.6ms, AutomataDifference: 597856.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2466 SDtfs, 24026 SDslu, 32024 SDs, 0 SdLazy, 143674 SolverSat, 11708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 106796.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6288 GetRequests, 1495 SyntacticMatches, 172 SemanticMatches, 4620 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89785 ImplicationChecksByTransitivity, 449568.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9471occurred in iteration=80, InterpolantAutomatonStates: 3944, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18069.9ms AutomataMinimizationTime, 80 MinimizatonAttempts, 333981 StatesRemovedByMinimization, 78 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 370.4ms SsaConstructionTime, 1027.6ms SatisfiabilityAnalysisTime, 177692.4ms InterpolantComputationTime, 5350 NumberOfCodeBlocks, 5350 NumberOfCodeBlocksAsserted, 313 NumberOfCheckSat, 5192 ConstructedInterpolants, 0 QuantifiedInterpolants, 104267 SizeOfPredicates, 488 NumberOfNonLiveVariables, 4859 ConjunctsInSsa, 1510 ConjunctsInUnsatCore, 158 InterpolantComputations, 4 PerfectInterpolantSequences, 122/2314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown