/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:15:54,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:15:54,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:15:54,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:15:54,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:15:54,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:15:54,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:15:54,441 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-Separate.epf [2021-05-22 02:15:54,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:15:54,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:15:54,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:15:54,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:15:54,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:15:54,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:15:54,481 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:15:54,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:15:54,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:15:54,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:15:54,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:15:54,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:15:54,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:15:54,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:15:54,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:15:54,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:15:54,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:15:54,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:15:54,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:15:54,486 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:15:54,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:15:54,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:15:54,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:15:54,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:15:54,781 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:15:54,782 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:15:54,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2021-05-22 02:15:54,784 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2021-05-22 02:15:54,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:15:54,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:15:54,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:15:54,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:15:54,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:15:54,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:15:54,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:15:54,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:15:54,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:15:54,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... [2021-05-22 02:15:54,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:15:54,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:15:54,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:15:54,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:15:54,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:15:54,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:15:54,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:15:54,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:15:54,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:15:54,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:15:54,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:15:54,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:15:54,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:15:54,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:15:54,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:15:54,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:15:54,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:15:54,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:15:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:15:54,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:15:54,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-22 02:15:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-22 02:15:54,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-22 02:15:54,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-05-22 02:15:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-05-22 02:15:54,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-05-22 02:15:54,928 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:15:55,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:15:55,077 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:15:55,078 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:15:55 BoogieIcfgContainer [2021-05-22 02:15:55,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:15:55,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:15:55,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:15:55,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:15:55,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:15:54" (1/2) ... [2021-05-22 02:15:55,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d86a8 and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:15:55, skipping insertion in model container [2021-05-22 02:15:55,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:15:55" (2/2) ... [2021-05-22 02:15:55,084 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2021-05-22 02:15:55,089 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:15:55,089 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:15:55,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:15:55,090 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:15:55,160 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-05-22 02:15:55,178 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:15:55,194 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:15:55,195 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:15:55,195 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:15:55,195 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:15:55,195 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:15:55,195 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:15:55,195 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:15:55,195 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:15:55,204 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 47 transitions, 142 flow [2021-05-22 02:15:55,901 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:15:56,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:56,022 INFO L521 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] [2021-05-22 02:15:56,023 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1044529094, now seen corresponding path program 1 times [2021-05-22 02:15:56,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:56,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935788338] [2021-05-22 02:15:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:56,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935788338] [2021-05-22 02:15:56,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935788338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:15:56,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:15:56,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:15:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406142048] [2021-05-22 02:15:56,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:15:56,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:15:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:15:56,277 INFO L87 Difference]: Start difference. First operand has 6831 states, 6829 states have (on average 5.865426856055059) internal successors, (40055), 6830 states have internal predecessors, (40055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:56,798 INFO L93 Difference]: Finished difference Result 13654 states and 80102 transitions. [2021-05-22 02:15:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:15:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:15:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:57,112 INFO L225 Difference]: With dead ends: 13654 [2021-05-22 02:15:57,112 INFO L226 Difference]: Without dead ends: 13527 [2021-05-22 02:15:57,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:15:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-05-22 02:15:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8158. [2021-05-22 02:15:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 5.851538555841609) internal successors, (47731), 8157 states have internal predecessors, (47731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 47731 transitions. [2021-05-22 02:15:57,998 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 47731 transitions. Word has length 27 [2021-05-22 02:15:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:15:58,002 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 47731 transitions. [2021-05-22 02:15:58,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 47731 transitions. [2021-05-22 02:15:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:15:58,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:15:58,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:15:58,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:15:58,048 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:15:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:15:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1567455164, now seen corresponding path program 1 times [2021-05-22 02:15:58,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:15:58,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499678523] [2021-05-22 02:15:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:15:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:58,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:15:58,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499678523] [2021-05-22 02:15:58,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499678523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:58,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080095772] [2021-05-22 02:15:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:15:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:15:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:15:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:15:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:15:58,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080095772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:15:58,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:15:58,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:15:58,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860845579] [2021-05-22 02:15:58,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:15:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:15:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:15:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:15:58,348 INFO L87 Difference]: Start difference. First operand 8158 states and 47731 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:15:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:15:58,749 INFO L93 Difference]: Finished difference Result 21114 states and 121111 transitions. [2021-05-22 02:15:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:15:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:15:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:15:59,078 INFO L225 Difference]: With dead ends: 21114 [2021-05-22 02:15:59,079 INFO L226 Difference]: Without dead ends: 21114 [2021-05-22 02:15:59,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:15:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-05-22 02:15:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 10411. [2021-05-22 02:15:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 5.94447646493756) internal successors, (61882), 10410 states have internal predecessors, (61882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 61882 transitions. [2021-05-22 02:16:00,021 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 61882 transitions. Word has length 29 [2021-05-22 02:16:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:00,022 INFO L482 AbstractCegarLoop]: Abstraction has 10411 states and 61882 transitions. [2021-05-22 02:16:00,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 61882 transitions. [2021-05-22 02:16:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:00,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:00,076 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:00,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-22 02:16:00,301 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1130933432, now seen corresponding path program 1 times [2021-05-22 02:16:00,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:00,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459338450] [2021-05-22 02:16:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:00,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:00,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459338450] [2021-05-22 02:16:00,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459338450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:00,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:00,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650431649] [2021-05-22 02:16:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:00,354 INFO L87 Difference]: Start difference. First operand 10411 states and 61882 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:00,741 INFO L93 Difference]: Finished difference Result 14973 states and 85568 transitions. [2021-05-22 02:16:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:16:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:00,974 INFO L225 Difference]: With dead ends: 14973 [2021-05-22 02:16:00,974 INFO L226 Difference]: Without dead ends: 14893 [2021-05-22 02:16:00,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14893 states. [2021-05-22 02:16:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14893 to 11995. [2021-05-22 02:16:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11994 states have (on average 5.837335334333834) internal successors, (70013), 11994 states have internal predecessors, (70013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 70013 transitions. [2021-05-22 02:16:01,662 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 70013 transitions. Word has length 29 [2021-05-22 02:16:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:01,662 INFO L482 AbstractCegarLoop]: Abstraction has 11995 states and 70013 transitions. [2021-05-22 02:16:01,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 70013 transitions. [2021-05-22 02:16:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:01,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:01,718 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:01,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:16:01,719 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash 133583944, now seen corresponding path program 1 times [2021-05-22 02:16:01,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:01,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206217266] [2021-05-22 02:16:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:02,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206217266] [2021-05-22 02:16:02,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206217266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:02,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214659695] [2021-05-22 02:16:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:16:02,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:02,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214659695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:02,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:02,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-22 02:16:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231697015] [2021-05-22 02:16:02,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:02,268 INFO L87 Difference]: Start difference. First operand 11995 states and 70013 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:02,718 INFO L93 Difference]: Finished difference Result 30637 states and 176852 transitions. [2021-05-22 02:16:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:03,001 INFO L225 Difference]: With dead ends: 30637 [2021-05-22 02:16:03,001 INFO L226 Difference]: Without dead ends: 30637 [2021-05-22 02:16:03,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30637 states. [2021-05-22 02:16:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30637 to 15205. [2021-05-22 02:16:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15205 states, 15204 states have (on average 5.956393054459353) internal successors, (90561), 15204 states have internal predecessors, (90561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15205 states to 15205 states and 90561 transitions. [2021-05-22 02:16:04,191 INFO L78 Accepts]: Start accepts. Automaton has 15205 states and 90561 transitions. Word has length 29 [2021-05-22 02:16:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:04,192 INFO L482 AbstractCegarLoop]: Abstraction has 15205 states and 90561 transitions. [2021-05-22 02:16:04,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 15205 states and 90561 transitions. [2021-05-22 02:16:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:04,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:04,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:04,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:04,485 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:04,486 INFO L82 PathProgramCache]: Analyzing trace with hash -8467834, now seen corresponding path program 1 times [2021-05-22 02:16:04,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:04,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411278992] [2021-05-22 02:16:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:04,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411278992] [2021-05-22 02:16:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411278992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887370203] [2021-05-22 02:16:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:16:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887370203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:04,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:04,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-22 02:16:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401078497] [2021-05-22 02:16:04,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:04,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:04,669 INFO L87 Difference]: Start difference. First operand 15205 states and 90561 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:05,284 INFO L93 Difference]: Finished difference Result 36877 states and 218066 transitions. [2021-05-22 02:16:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:05,541 INFO L225 Difference]: With dead ends: 36877 [2021-05-22 02:16:05,541 INFO L226 Difference]: Without dead ends: 36877 [2021-05-22 02:16:05,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36877 states. [2021-05-22 02:16:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36877 to 20146. [2021-05-22 02:16:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20146 states, 20145 states have (on average 6.068304790270538) internal successors, (122246), 20145 states have internal predecessors, (122246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 122246 transitions. [2021-05-22 02:16:06,846 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 122246 transitions. Word has length 29 [2021-05-22 02:16:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:06,846 INFO L482 AbstractCegarLoop]: Abstraction has 20146 states and 122246 transitions. [2021-05-22 02:16:06,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 122246 transitions. [2021-05-22 02:16:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:06,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:06,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:07,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:07,112 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1681375674, now seen corresponding path program 1 times [2021-05-22 02:16:07,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:07,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110390449] [2021-05-22 02:16:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:07,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:07,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110390449] [2021-05-22 02:16:07,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110390449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:07,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:07,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:07,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638073847] [2021-05-22 02:16:07,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:07,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:07,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:07,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:07,174 INFO L87 Difference]: Start difference. First operand 20146 states and 122246 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:07,491 INFO L93 Difference]: Finished difference Result 31288 states and 185448 transitions. [2021-05-22 02:16:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:07,642 INFO L225 Difference]: With dead ends: 31288 [2021-05-22 02:16:07,643 INFO L226 Difference]: Without dead ends: 31121 [2021-05-22 02:16:07,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31121 states. [2021-05-22 02:16:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31121 to 21451. [2021-05-22 02:16:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21451 states, 21450 states have (on average 6.020652680652681) internal successors, (129143), 21450 states have internal predecessors, (129143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21451 states to 21451 states and 129143 transitions. [2021-05-22 02:16:08,783 INFO L78 Accepts]: Start accepts. Automaton has 21451 states and 129143 transitions. Word has length 29 [2021-05-22 02:16:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:08,784 INFO L482 AbstractCegarLoop]: Abstraction has 21451 states and 129143 transitions. [2021-05-22 02:16:08,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 21451 states and 129143 transitions. [2021-05-22 02:16:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:08,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:08,842 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:08,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:16:08,842 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1659787256, now seen corresponding path program 1 times [2021-05-22 02:16:08,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:08,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324647640] [2021-05-22 02:16:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:08,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:08,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324647640] [2021-05-22 02:16:08,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324647640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:08,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:08,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:08,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419656184] [2021-05-22 02:16:08,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:08,872 INFO L87 Difference]: Start difference. First operand 21451 states and 129143 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:09,619 INFO L93 Difference]: Finished difference Result 36020 states and 210532 transitions. [2021-05-22 02:16:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:09,797 INFO L225 Difference]: With dead ends: 36020 [2021-05-22 02:16:09,797 INFO L226 Difference]: Without dead ends: 35844 [2021-05-22 02:16:09,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35844 states. [2021-05-22 02:16:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35844 to 23309. [2021-05-22 02:16:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23309 states, 23308 states have (on average 5.963188604770894) internal successors, (138990), 23308 states have internal predecessors, (138990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23309 states to 23309 states and 138990 transitions. [2021-05-22 02:16:10,995 INFO L78 Accepts]: Start accepts. Automaton has 23309 states and 138990 transitions. Word has length 29 [2021-05-22 02:16:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:10,995 INFO L482 AbstractCegarLoop]: Abstraction has 23309 states and 138990 transitions. [2021-05-22 02:16:10,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23309 states and 138990 transitions. [2021-05-22 02:16:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:11,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:11,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:11,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:16:11,076 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:11,076 INFO L82 PathProgramCache]: Analyzing trace with hash 25043654, now seen corresponding path program 2 times [2021-05-22 02:16:11,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:11,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053797680] [2021-05-22 02:16:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:11,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:11,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053797680] [2021-05-22 02:16:11,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053797680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:11,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:11,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:11,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528673306] [2021-05-22 02:16:11,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:11,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:11,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:11,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:11,114 INFO L87 Difference]: Start difference. First operand 23309 states and 138990 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:11,498 INFO L93 Difference]: Finished difference Result 35264 states and 207669 transitions. [2021-05-22 02:16:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:11,675 INFO L225 Difference]: With dead ends: 35264 [2021-05-22 02:16:11,676 INFO L226 Difference]: Without dead ends: 35264 [2021-05-22 02:16:11,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35264 states. [2021-05-22 02:16:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35264 to 26215. [2021-05-22 02:16:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26215 states, 26214 states have (on average 5.978828107118334) internal successors, (156729), 26214 states have internal predecessors, (156729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26215 states to 26215 states and 156729 transitions. [2021-05-22 02:16:13,070 INFO L78 Accepts]: Start accepts. Automaton has 26215 states and 156729 transitions. Word has length 29 [2021-05-22 02:16:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:13,071 INFO L482 AbstractCegarLoop]: Abstraction has 26215 states and 156729 transitions. [2021-05-22 02:16:13,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26215 states and 156729 transitions. [2021-05-22 02:16:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:13,155 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:13,155 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:13,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:16:13,155 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:13,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1371840000, now seen corresponding path program 2 times [2021-05-22 02:16:13,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:13,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273287067] [2021-05-22 02:16:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:13,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273287067] [2021-05-22 02:16:13,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273287067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:13,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:13,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:13,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007361848] [2021-05-22 02:16:13,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:13,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:13,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:13,180 INFO L87 Difference]: Start difference. First operand 26215 states and 156729 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:13,963 INFO L93 Difference]: Finished difference Result 35265 states and 205937 transitions. [2021-05-22 02:16:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:14,126 INFO L225 Difference]: With dead ends: 35265 [2021-05-22 02:16:14,126 INFO L226 Difference]: Without dead ends: 35115 [2021-05-22 02:16:14,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35115 states. [2021-05-22 02:16:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35115 to 27707. [2021-05-22 02:16:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27707 states, 27706 states have (on average 5.942972641305133) internal successors, (164656), 27706 states have internal predecessors, (164656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27707 states to 27707 states and 164656 transitions. [2021-05-22 02:16:15,391 INFO L78 Accepts]: Start accepts. Automaton has 27707 states and 164656 transitions. Word has length 29 [2021-05-22 02:16:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:15,391 INFO L482 AbstractCegarLoop]: Abstraction has 27707 states and 164656 transitions. [2021-05-22 02:16:15,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 27707 states and 164656 transitions. [2021-05-22 02:16:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:15,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:15,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:15,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:16:15,482 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -490301020, now seen corresponding path program 2 times [2021-05-22 02:16:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:15,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095620270] [2021-05-22 02:16:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:15,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:15,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095620270] [2021-05-22 02:16:15,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095620270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:15,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:15,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:15,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537103653] [2021-05-22 02:16:15,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:15,525 INFO L87 Difference]: Start difference. First operand 27707 states and 164656 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:15,930 INFO L93 Difference]: Finished difference Result 45133 states and 263334 transitions. [2021-05-22 02:16:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:15,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:16,700 INFO L225 Difference]: With dead ends: 45133 [2021-05-22 02:16:16,700 INFO L226 Difference]: Without dead ends: 45133 [2021-05-22 02:16:16,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45133 states. [2021-05-22 02:16:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45133 to 32206. [2021-05-22 02:16:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32206 states, 32205 states have (on average 5.952895513119081) internal successors, (191713), 32205 states have internal predecessors, (191713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32206 states to 32206 states and 191713 transitions. [2021-05-22 02:16:18,515 INFO L78 Accepts]: Start accepts. Automaton has 32206 states and 191713 transitions. Word has length 29 [2021-05-22 02:16:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:18,516 INFO L482 AbstractCegarLoop]: Abstraction has 32206 states and 191713 transitions. [2021-05-22 02:16:18,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 32206 states and 191713 transitions. [2021-05-22 02:16:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:18,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:18,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:18,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:16:18,625 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1923189408, now seen corresponding path program 2 times [2021-05-22 02:16:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723230016] [2021-05-22 02:16:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:18,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723230016] [2021-05-22 02:16:18,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723230016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:18,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:18,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:18,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435807161] [2021-05-22 02:16:18,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:18,669 INFO L87 Difference]: Start difference. First operand 32206 states and 191713 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:19,072 INFO L93 Difference]: Finished difference Result 45104 states and 260644 transitions. [2021-05-22 02:16:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:19,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:19,283 INFO L225 Difference]: With dead ends: 45104 [2021-05-22 02:16:19,284 INFO L226 Difference]: Without dead ends: 44872 [2021-05-22 02:16:19,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44872 states. [2021-05-22 02:16:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44872 to 34465. [2021-05-22 02:16:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34465 states, 34464 states have (on average 5.9103122098421546) internal successors, (203693), 34464 states have internal predecessors, (203693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34465 states to 34465 states and 203693 transitions. [2021-05-22 02:16:20,917 INFO L78 Accepts]: Start accepts. Automaton has 34465 states and 203693 transitions. Word has length 29 [2021-05-22 02:16:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:20,917 INFO L482 AbstractCegarLoop]: Abstraction has 34465 states and 203693 transitions. [2021-05-22 02:16:20,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 34465 states and 203693 transitions. [2021-05-22 02:16:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:16:21,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:21,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:21,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:16:21,020 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:21,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2077952268, now seen corresponding path program 2 times [2021-05-22 02:16:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:21,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282939472] [2021-05-22 02:16:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:21,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:21,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282939472] [2021-05-22 02:16:21,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282939472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:21,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:21,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:16:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392164730] [2021-05-22 02:16:21,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:16:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:16:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:21,051 INFO L87 Difference]: Start difference. First operand 34465 states and 203693 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:21,983 INFO L93 Difference]: Finished difference Result 47735 states and 276681 transitions. [2021-05-22 02:16:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:21,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:16:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:22,213 INFO L225 Difference]: With dead ends: 47735 [2021-05-22 02:16:22,213 INFO L226 Difference]: Without dead ends: 47735 [2021-05-22 02:16:22,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47735 states. [2021-05-22 02:16:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47735 to 37708. [2021-05-22 02:16:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37708 states, 37707 states have (on average 5.9143660328321) internal successors, (223013), 37707 states have internal predecessors, (223013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37708 states to 37708 states and 223013 transitions. [2021-05-22 02:16:23,980 INFO L78 Accepts]: Start accepts. Automaton has 37708 states and 223013 transitions. Word has length 29 [2021-05-22 02:16:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:23,980 INFO L482 AbstractCegarLoop]: Abstraction has 37708 states and 223013 transitions. [2021-05-22 02:16:23,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 37708 states and 223013 transitions. [2021-05-22 02:16:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:16:24,095 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:24,095 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:24,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:16:24,096 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1308062790, now seen corresponding path program 1 times [2021-05-22 02:16:24,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:24,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403948602] [2021-05-22 02:16:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:24,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:24,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403948602] [2021-05-22 02:16:24,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403948602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:24,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575638907] [2021-05-22 02:16:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:24,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:16:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:24,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575638907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:24,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:24,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-05-22 02:16:24,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772465486] [2021-05-22 02:16:24,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:16:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:16:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:24,447 INFO L87 Difference]: Start difference. First operand 37708 states and 223013 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 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) [2021-05-22 02:16:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:25,640 INFO L93 Difference]: Finished difference Result 48610 states and 280421 transitions. [2021-05-22 02:16:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 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 31 [2021-05-22 02:16:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:25,892 INFO L225 Difference]: With dead ends: 48610 [2021-05-22 02:16:25,892 INFO L226 Difference]: Without dead ends: 48062 [2021-05-22 02:16:25,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48062 states. [2021-05-22 02:16:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48062 to 40315. [2021-05-22 02:16:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40315 states, 40314 states have (on average 5.896785235898199) internal successors, (237723), 40314 states have internal predecessors, (237723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40315 states to 40315 states and 237723 transitions. [2021-05-22 02:16:27,715 INFO L78 Accepts]: Start accepts. Automaton has 40315 states and 237723 transitions. Word has length 31 [2021-05-22 02:16:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:27,715 INFO L482 AbstractCegarLoop]: Abstraction has 40315 states and 237723 transitions. [2021-05-22 02:16:27,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 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) [2021-05-22 02:16:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 40315 states and 237723 transitions. [2021-05-22 02:16:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:16:27,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:27,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:28,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:28,039 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:28,040 INFO L82 PathProgramCache]: Analyzing trace with hash -280107528, now seen corresponding path program 2 times [2021-05-22 02:16:28,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:28,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75367569] [2021-05-22 02:16:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:16:28,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:28,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75367569] [2021-05-22 02:16:28,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75367569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:28,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:28,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:28,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542207640] [2021-05-22 02:16:28,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:28,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:28,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:28,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:28,104 INFO L87 Difference]: Start difference. First operand 40315 states and 237723 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-05-22 02:16:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:28,541 INFO L93 Difference]: Finished difference Result 50404 states and 290958 transitions. [2021-05-22 02:16:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:16:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-05-22 02:16:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:29,429 INFO L225 Difference]: With dead ends: 50404 [2021-05-22 02:16:29,430 INFO L226 Difference]: Without dead ends: 49856 [2021-05-22 02:16:29,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2021-05-22 02:16:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 42372. [2021-05-22 02:16:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42372 states, 42371 states have (on average 5.882112765806802) internal successors, (249231), 42371 states have internal predecessors, (249231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42372 states to 42372 states and 249231 transitions. [2021-05-22 02:16:31,341 INFO L78 Accepts]: Start accepts. Automaton has 42372 states and 249231 transitions. Word has length 31 [2021-05-22 02:16:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:31,342 INFO L482 AbstractCegarLoop]: Abstraction has 42372 states and 249231 transitions. [2021-05-22 02:16:31,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-05-22 02:16:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42372 states and 249231 transitions. [2021-05-22 02:16:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:16:31,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:31,485 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:31,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:16:31,485 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash -904748022, now seen corresponding path program 1 times [2021-05-22 02:16:31,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:31,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485237125] [2021-05-22 02:16:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:31,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485237125] [2021-05-22 02:16:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485237125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810799338] [2021-05-22 02:16:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:16:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:31,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810799338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:31,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:31,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-05-22 02:16:31,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676459164] [2021-05-22 02:16:31,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:16:31,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:31,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:16:31,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:31,735 INFO L87 Difference]: Start difference. First operand 42372 states and 249231 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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) [2021-05-22 02:16:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:32,349 INFO L93 Difference]: Finished difference Result 53113 states and 305911 transitions. [2021-05-22 02:16:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:16:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:32,608 INFO L225 Difference]: With dead ends: 53113 [2021-05-22 02:16:32,609 INFO L226 Difference]: Without dead ends: 52637 [2021-05-22 02:16:32,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52637 states. [2021-05-22 02:16:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52637 to 45439. [2021-05-22 02:16:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 5.865487037281571) internal successors, (266516), 45438 states have internal predecessors, (266516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 266516 transitions. [2021-05-22 02:16:35,154 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 266516 transitions. Word has length 31 [2021-05-22 02:16:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:35,154 INFO L482 AbstractCegarLoop]: Abstraction has 45439 states and 266516 transitions. [2021-05-22 02:16:35,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 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) [2021-05-22 02:16:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 266516 transitions. [2021-05-22 02:16:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:16:35,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:35,294 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:35,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:16:35,497 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1844291576, now seen corresponding path program 2 times [2021-05-22 02:16:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:35,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794822938] [2021-05-22 02:16:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:16:35,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:35,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794822938] [2021-05-22 02:16:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794822938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:35,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014637260] [2021-05-22 02:16:35,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:35,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:35,553 INFO L87 Difference]: Start difference. First operand 45439 states and 266516 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-05-22 02:16:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:36,071 INFO L93 Difference]: Finished difference Result 55542 states and 319905 transitions. [2021-05-22 02:16:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:16:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-05-22 02:16:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:36,332 INFO L225 Difference]: With dead ends: 55542 [2021-05-22 02:16:36,332 INFO L226 Difference]: Without dead ends: 55066 [2021-05-22 02:16:36,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55066 states. [2021-05-22 02:16:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55066 to 48103. [2021-05-22 02:16:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48103 states, 48102 states have (on average 5.849070724709991) internal successors, (281352), 48102 states have internal predecessors, (281352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48103 states to 48103 states and 281352 transitions. [2021-05-22 02:16:38,920 INFO L78 Accepts]: Start accepts. Automaton has 48103 states and 281352 transitions. Word has length 31 [2021-05-22 02:16:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:38,920 INFO L482 AbstractCegarLoop]: Abstraction has 48103 states and 281352 transitions. [2021-05-22 02:16:38,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-05-22 02:16:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 48103 states and 281352 transitions. [2021-05-22 02:16:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:16:39,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:39,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:39,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:16:39,069 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:39,070 INFO L82 PathProgramCache]: Analyzing trace with hash 858374, now seen corresponding path program 1 times [2021-05-22 02:16:39,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:39,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285793074] [2021-05-22 02:16:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:39,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285793074] [2021-05-22 02:16:39,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285793074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748870165] [2021-05-22 02:16:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-05-22 02:16:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:39,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:16:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:39,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748870165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:39,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:39,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-05-22 02:16:39,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325452608] [2021-05-22 02:16:39,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:16:39,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:16:39,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:39,328 INFO L87 Difference]: Start difference. First operand 48103 states and 281352 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:39,908 INFO L93 Difference]: Finished difference Result 56784 states and 326793 transitions. [2021-05-22 02:16:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:16:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:16:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:40,159 INFO L225 Difference]: With dead ends: 56784 [2021-05-22 02:16:40,160 INFO L226 Difference]: Without dead ends: 56381 [2021-05-22 02:16:40,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:16:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56381 states. [2021-05-22 02:16:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56381 to 50997. [2021-05-22 02:16:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50997 states, 50996 states have (on average 5.823652835516511) internal successors, (296983), 50996 states have internal predecessors, (296983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50997 states to 50997 states and 296983 transitions. [2021-05-22 02:16:42,826 INFO L78 Accepts]: Start accepts. Automaton has 50997 states and 296983 transitions. Word has length 31 [2021-05-22 02:16:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:42,826 INFO L482 AbstractCegarLoop]: Abstraction has 50997 states and 296983 transitions. [2021-05-22 02:16:42,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 50997 states and 296983 transitions. [2021-05-22 02:16:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:16:42,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:42,988 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:43,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:16:43,189 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash 309047268, now seen corresponding path program 2 times [2021-05-22 02:16:43,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:43,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655415132] [2021-05-22 02:16:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:16:43,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:43,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655415132] [2021-05-22 02:16:43,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655415132] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:16:43,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:16:43,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:16:43,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614813262] [2021-05-22 02:16:43,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:16:43,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:16:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:43,250 INFO L87 Difference]: Start difference. First operand 50997 states and 296983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-05-22 02:16:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:43,767 INFO L93 Difference]: Finished difference Result 58483 states and 336376 transitions. [2021-05-22 02:16:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:16:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-05-22 02:16:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:44,026 INFO L225 Difference]: With dead ends: 58483 [2021-05-22 02:16:44,026 INFO L226 Difference]: Without dead ends: 58080 [2021-05-22 02:16:44,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:16:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58080 states. [2021-05-22 02:16:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58080 to 53054. [2021-05-22 02:16:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53054 states, 53053 states have (on average 5.811565792697868) internal successors, (308321), 53053 states have internal predecessors, (308321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53054 states to 53054 states and 308321 transitions. [2021-05-22 02:16:46,589 INFO L78 Accepts]: Start accepts. Automaton has 53054 states and 308321 transitions. Word has length 31 [2021-05-22 02:16:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:46,589 INFO L482 AbstractCegarLoop]: Abstraction has 53054 states and 308321 transitions. [2021-05-22 02:16:46,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2021-05-22 02:16:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 53054 states and 308321 transitions. [2021-05-22 02:16:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:46,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:46,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:46,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:16:46,743 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:46,743 INFO L82 PathProgramCache]: Analyzing trace with hash 131288516, now seen corresponding path program 3 times [2021-05-22 02:16:46,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:46,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182834165] [2021-05-22 02:16:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:46,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:46,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182834165] [2021-05-22 02:16:46,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182834165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:46,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938368872] [2021-05-22 02:16:46,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:46,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:16:46,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:16:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:46,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938368872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:46,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:46,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:16:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501628731] [2021-05-22 02:16:46,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:16:46,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:16:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:16:46,919 INFO L87 Difference]: Start difference. First operand 53054 states and 308321 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-05-22 02:16:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:49,214 INFO L93 Difference]: Finished difference Result 166964 states and 963436 transitions. [2021-05-22 02:16:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:16:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:50,704 INFO L225 Difference]: With dead ends: 166964 [2021-05-22 02:16:50,704 INFO L226 Difference]: Without dead ends: 166964 [2021-05-22 02:16:50,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:16:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166964 states. [2021-05-22 02:16:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166964 to 71659. [2021-05-22 02:16:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71659 states, 71658 states have (on average 5.932080158530799) internal successors, (425081), 71658 states have internal predecessors, (425081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:16:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71659 states to 71659 states and 425081 transitions. [2021-05-22 02:16:54,852 INFO L78 Accepts]: Start accepts. Automaton has 71659 states and 425081 transitions. Word has length 33 [2021-05-22 02:16:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:16:54,852 INFO L482 AbstractCegarLoop]: Abstraction has 71659 states and 425081 transitions. [2021-05-22 02:16:54,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-05-22 02:16:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 71659 states and 425081 transitions. [2021-05-22 02:16:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:16:55,092 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:16:55,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:16:55,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:55,297 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:16:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:16:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1278122040, now seen corresponding path program 4 times [2021-05-22 02:16:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:16:55,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796982422] [2021-05-22 02:16:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:16:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:16:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:55,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:16:55,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796982422] [2021-05-22 02:16:55,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796982422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:55,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593175275] [2021-05-22 02:16:55,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:16:55,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:16:55,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:16:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:16:55,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:16:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:16:55,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593175275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:16:55,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:16:55,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:16:55,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878565616] [2021-05-22 02:16:55,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:16:55,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:16:55,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:16:55,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:16:55,494 INFO L87 Difference]: Start difference. First operand 71659 states and 425081 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-05-22 02:16:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:16:58,448 INFO L93 Difference]: Finished difference Result 151965 states and 880181 transitions. [2021-05-22 02:16:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:16:58,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:16:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:16:59,296 INFO L225 Difference]: With dead ends: 151965 [2021-05-22 02:16:59,296 INFO L226 Difference]: Without dead ends: 151069 [2021-05-22 02:16:59,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:16:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151069 states. [2021-05-22 02:17:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151069 to 98035. [2021-05-22 02:17:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98035 states, 98034 states have (on average 6.051471938307118) internal successors, (593250), 98034 states have internal predecessors, (593250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98035 states to 98035 states and 593250 transitions. [2021-05-22 02:17:05,087 INFO L78 Accepts]: Start accepts. Automaton has 98035 states and 593250 transitions. Word has length 33 [2021-05-22 02:17:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:05,087 INFO L482 AbstractCegarLoop]: Abstraction has 98035 states and 593250 transitions. [2021-05-22 02:17:05,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-05-22 02:17:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 98035 states and 593250 transitions. [2021-05-22 02:17:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:05,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:05,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:05,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:05,663 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1305965304, now seen corresponding path program 5 times [2021-05-22 02:17:05,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:05,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144785490] [2021-05-22 02:17:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:05,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:05,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144785490] [2021-05-22 02:17:05,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144785490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148490047] [2021-05-22 02:17:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:05,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:17:05,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:05,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:17:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:05,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148490047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:05,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:05,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:17:05,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328327995] [2021-05-22 02:17:05,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:17:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:17:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:17:05,821 INFO L87 Difference]: Start difference. First operand 98035 states and 593250 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:08,665 INFO L93 Difference]: Finished difference Result 145413 states and 850897 transitions. [2021-05-22 02:17:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:17:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:09,871 INFO L225 Difference]: With dead ends: 145413 [2021-05-22 02:17:09,871 INFO L226 Difference]: Without dead ends: 145413 [2021-05-22 02:17:09,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:17:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145413 states. [2021-05-22 02:17:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145413 to 96954. [2021-05-22 02:17:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96954 states, 96953 states have (on average 6.02823017338298) internal successors, (584455), 96953 states have internal predecessors, (584455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96954 states to 96954 states and 584455 transitions. [2021-05-22 02:17:15,473 INFO L78 Accepts]: Start accepts. Automaton has 96954 states and 584455 transitions. Word has length 33 [2021-05-22 02:17:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:15,474 INFO L482 AbstractCegarLoop]: Abstraction has 96954 states and 584455 transitions. [2021-05-22 02:17:15,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 96954 states and 584455 transitions. [2021-05-22 02:17:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:15,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:15,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:16,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:16,010 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1278439228, now seen corresponding path program 6 times [2021-05-22 02:17:16,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:16,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126004403] [2021-05-22 02:17:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:16,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:16,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126004403] [2021-05-22 02:17:16,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126004403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:16,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711535456] [2021-05-22 02:17:16,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:16,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:17:16,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:16,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:17:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:16,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711535456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:16,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:16,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:17:16,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822054563] [2021-05-22 02:17:16,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:17:16,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:16,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:17:16,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:17:16,207 INFO L87 Difference]: Start difference. First operand 96954 states and 584455 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:18,419 INFO L93 Difference]: Finished difference Result 133964 states and 783258 transitions. [2021-05-22 02:17:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:17:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:19,884 INFO L225 Difference]: With dead ends: 133964 [2021-05-22 02:17:19,884 INFO L226 Difference]: Without dead ends: 133804 [2021-05-22 02:17:19,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:17:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133804 states. [2021-05-22 02:17:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133804 to 97004. [2021-05-22 02:17:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97004 states, 97003 states have (on average 6.026844530581529) internal successors, (584622), 97003 states have internal predecessors, (584622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97004 states to 97004 states and 584622 transitions. [2021-05-22 02:17:24,456 INFO L78 Accepts]: Start accepts. Automaton has 97004 states and 584622 transitions. Word has length 33 [2021-05-22 02:17:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:24,456 INFO L482 AbstractCegarLoop]: Abstraction has 97004 states and 584622 transitions. [2021-05-22 02:17:24,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 97004 states and 584622 transitions. [2021-05-22 02:17:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:25,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:25,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:26,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:26,069 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash 11476090, now seen corresponding path program 7 times [2021-05-22 02:17:26,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:26,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269207241] [2021-05-22 02:17:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:26,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269207241] [2021-05-22 02:17:26,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269207241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439717817] [2021-05-22 02:17:26,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:26,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:17:26,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:26,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439717817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:26,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:26,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:17:26,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101901106] [2021-05-22 02:17:26,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:17:26,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:26,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:17:26,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:17:26,231 INFO L87 Difference]: Start difference. First operand 97004 states and 584622 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:29,215 INFO L93 Difference]: Finished difference Result 227012 states and 1346306 transitions. [2021-05-22 02:17:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:17:29,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:31,267 INFO L225 Difference]: With dead ends: 227012 [2021-05-22 02:17:31,267 INFO L226 Difference]: Without dead ends: 227012 [2021-05-22 02:17:31,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:17:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227012 states. [2021-05-22 02:17:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227012 to 126089. [2021-05-22 02:17:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126089 states, 126088 states have (on average 6.168192056341603) internal successors, (777735), 126088 states have internal predecessors, (777735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126089 states to 126089 states and 777735 transitions. [2021-05-22 02:17:39,061 INFO L78 Accepts]: Start accepts. Automaton has 126089 states and 777735 transitions. Word has length 33 [2021-05-22 02:17:39,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:39,061 INFO L482 AbstractCegarLoop]: Abstraction has 126089 states and 777735 transitions. [2021-05-22 02:17:39,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 126089 states and 777735 transitions. [2021-05-22 02:17:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:39,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:39,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:39,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-22 02:17:39,698 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1498559738, now seen corresponding path program 8 times [2021-05-22 02:17:39,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:39,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672358066] [2021-05-22 02:17:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:39,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672358066] [2021-05-22 02:17:39,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672358066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534555208] [2021-05-22 02:17:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:39,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:17:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:17:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:39,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534555208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:39,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:39,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:17:39,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360350172] [2021-05-22 02:17:39,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:17:39,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:39,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:17:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:17:39,841 INFO L87 Difference]: Start difference. First operand 126089 states and 777735 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:42,716 INFO L93 Difference]: Finished difference Result 173970 states and 1035526 transitions. [2021-05-22 02:17:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:17:42,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:17:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:43,837 INFO L225 Difference]: With dead ends: 173970 [2021-05-22 02:17:43,837 INFO L226 Difference]: Without dead ends: 173746 [2021-05-22 02:17:43,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:17:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2021-05-22 02:17:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 125926. [2021-05-22 02:17:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125926 states, 125925 states have (on average 6.16766329164185) internal successors, (776663), 125925 states have internal predecessors, (776663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125926 states to 125926 states and 776663 transitions. [2021-05-22 02:17:50,494 INFO L78 Accepts]: Start accepts. Automaton has 125926 states and 776663 transitions. Word has length 33 [2021-05-22 02:17:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:17:50,495 INFO L482 AbstractCegarLoop]: Abstraction has 125926 states and 776663 transitions. [2021-05-22 02:17:50,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 125926 states and 776663 transitions. [2021-05-22 02:17:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:17:51,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:17:51,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:17:52,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-22 02:17:52,090 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:17:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:17:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1518077302, now seen corresponding path program 9 times [2021-05-22 02:17:52,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:17:52,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060487258] [2021-05-22 02:17:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:17:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:17:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:52,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:17:52,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060487258] [2021-05-22 02:17:52,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060487258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:52,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751453766] [2021-05-22 02:17:52,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:17:52,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:17:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:17:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:17:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:17:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:17:52,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751453766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:17:52,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:17:52,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:17:52,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275264637] [2021-05-22 02:17:52,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:17:52,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:17:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:17:52,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:17:52,222 INFO L87 Difference]: Start difference. First operand 125926 states and 776663 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:17:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:17:54,781 INFO L93 Difference]: Finished difference Result 199329 states and 1186134 transitions. [2021-05-22 02:17:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:17:54,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 33 [2021-05-22 02:17:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:17:56,718 INFO L225 Difference]: With dead ends: 199329 [2021-05-22 02:17:56,718 INFO L226 Difference]: Without dead ends: 199329 [2021-05-22 02:17:56,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:17:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199329 states. [2021-05-22 02:18:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199329 to 128232. [2021-05-22 02:18:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128232 states, 128231 states have (on average 6.171487393843922) internal successors, (791376), 128231 states have internal predecessors, (791376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128232 states to 128232 states and 791376 transitions. [2021-05-22 02:18:04,058 INFO L78 Accepts]: Start accepts. Automaton has 128232 states and 791376 transitions. Word has length 33 [2021-05-22 02:18:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:04,058 INFO L482 AbstractCegarLoop]: Abstraction has 128232 states and 791376 transitions. [2021-05-22 02:18:04,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 128232 states and 791376 transitions. [2021-05-22 02:18:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:05,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:05,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:05,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-22 02:18:05,337 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1545603378, now seen corresponding path program 10 times [2021-05-22 02:18:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:05,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746926507] [2021-05-22 02:18:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:05,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:05,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746926507] [2021-05-22 02:18:05,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746926507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:05,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254389601] [2021-05-22 02:18:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:05,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:18:05,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:18:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254389601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:05,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:05,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:18:05,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727946990] [2021-05-22 02:18:05,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:18:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:18:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:18:05,582 INFO L87 Difference]: Start difference. First operand 128232 states and 791376 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:08,774 INFO L93 Difference]: Finished difference Result 216985 states and 1280323 transitions. [2021-05-22 02:18:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:18:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 33 [2021-05-22 02:18:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:11,590 INFO L225 Difference]: With dead ends: 216985 [2021-05-22 02:18:11,590 INFO L226 Difference]: Without dead ends: 216825 [2021-05-22 02:18:11,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:18:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216825 states. [2021-05-22 02:18:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216825 to 128330. [2021-05-22 02:18:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128330 states, 128329 states have (on average 6.170133017478512) internal successors, (791807), 128329 states have internal predecessors, (791807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128330 states to 128330 states and 791807 transitions. [2021-05-22 02:18:18,817 INFO L78 Accepts]: Start accepts. Automaton has 128330 states and 791807 transitions. Word has length 33 [2021-05-22 02:18:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:18,817 INFO L482 AbstractCegarLoop]: Abstraction has 128330 states and 791807 transitions. [2021-05-22 02:18:18,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 128330 states and 791807 transitions. [2021-05-22 02:18:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:19,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:19,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:19,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:19,515 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash -915701574, now seen corresponding path program 11 times [2021-05-22 02:18:19,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:19,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558983486] [2021-05-22 02:18:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:19,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:19,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558983486] [2021-05-22 02:18:19,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558983486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982870003] [2021-05-22 02:18:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:19,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:18:19,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:18:19,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:19,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982870003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:19,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:19,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:18:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680067317] [2021-05-22 02:18:19,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:18:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:19,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:18:19,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:18:19,672 INFO L87 Difference]: Start difference. First operand 128330 states and 791807 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-05-22 02:18:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:22,990 INFO L93 Difference]: Finished difference Result 212002 states and 1272275 transitions. [2021-05-22 02:18:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:18:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 33 [2021-05-22 02:18:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:24,317 INFO L225 Difference]: With dead ends: 212002 [2021-05-22 02:18:24,317 INFO L226 Difference]: Without dead ends: 212002 [2021-05-22 02:18:24,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:18:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212002 states. [2021-05-22 02:18:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212002 to 140596. [2021-05-22 02:18:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140596 states, 140595 states have (on average 6.156221771755752) internal successors, (865534), 140595 states have internal predecessors, (865534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140596 states to 140596 states and 865534 transitions. [2021-05-22 02:18:32,429 INFO L78 Accepts]: Start accepts. Automaton has 140596 states and 865534 transitions. Word has length 33 [2021-05-22 02:18:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:32,430 INFO L482 AbstractCegarLoop]: Abstraction has 140596 states and 865534 transitions. [2021-05-22 02:18:32,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-05-22 02:18:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 140596 states and 865534 transitions. [2021-05-22 02:18:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:32,947 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:32,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:33,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-22 02:18:33,148 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash 42418712, now seen corresponding path program 12 times [2021-05-22 02:18:33,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:33,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590275874] [2021-05-22 02:18:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:33,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:33,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590275874] [2021-05-22 02:18:33,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590275874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:33,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61942213] [2021-05-22 02:18:33,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:33,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:18:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:33,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:18:33,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:33,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61942213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:33,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:33,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:18:33,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29743616] [2021-05-22 02:18:33,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:18:33,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:18:33,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:18:33,294 INFO L87 Difference]: Start difference. First operand 140596 states and 865534 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-05-22 02:18:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:36,831 INFO L93 Difference]: Finished difference Result 227249 states and 1340487 transitions. [2021-05-22 02:18:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:18:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 33 [2021-05-22 02:18:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:18:38,958 INFO L225 Difference]: With dead ends: 227249 [2021-05-22 02:18:38,959 INFO L226 Difference]: Without dead ends: 226769 [2021-05-22 02:18:38,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:18:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226769 states. [2021-05-22 02:18:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226769 to 146902. [2021-05-22 02:18:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146902 states, 146901 states have (on average 6.137010639818653) internal successors, (901533), 146901 states have internal predecessors, (901533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146902 states to 146902 states and 901533 transitions. [2021-05-22 02:18:47,588 INFO L78 Accepts]: Start accepts. Automaton has 146902 states and 901533 transitions. Word has length 33 [2021-05-22 02:18:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:18:47,588 INFO L482 AbstractCegarLoop]: Abstraction has 146902 states and 901533 transitions. [2021-05-22 02:18:47,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-05-22 02:18:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 146902 states and 901533 transitions. [2021-05-22 02:18:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:18:48,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:18:48,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:18:48,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-22 02:18:48,330 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:18:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:18:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1161517172, now seen corresponding path program 3 times [2021-05-22 02:18:48,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:18:48,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376494830] [2021-05-22 02:18:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:18:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:18:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:48,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:18:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376494830] [2021-05-22 02:18:48,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376494830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568373724] [2021-05-22 02:18:48,369 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:18:48,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:18:48,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:18:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:18:48,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:18:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:18:48,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568373724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:18:48,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:18:48,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:18:48,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215176678] [2021-05-22 02:18:48,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:18:48,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:18:48,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:18:48,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:18:48,496 INFO L87 Difference]: Start difference. First operand 146902 states and 901533 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:18:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:18:57,906 INFO L93 Difference]: Finished difference Result 514975 states and 3149120 transitions. [2021-05-22 02:18:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:18:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:18:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:02,301 INFO L225 Difference]: With dead ends: 514975 [2021-05-22 02:19:02,302 INFO L226 Difference]: Without dead ends: 514975 [2021-05-22 02:19:02,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:19:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514975 states. [2021-05-22 02:19:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514975 to 223496. [2021-05-22 02:19:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223496 states, 223495 states have (on average 6.274547529027495) internal successors, (1402330), 223495 states have internal predecessors, (1402330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223496 states to 223496 states and 1402330 transitions. [2021-05-22 02:19:20,555 INFO L78 Accepts]: Start accepts. Automaton has 223496 states and 1402330 transitions. Word has length 33 [2021-05-22 02:19:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:20,555 INFO L482 AbstractCegarLoop]: Abstraction has 223496 states and 1402330 transitions. [2021-05-22 02:19:20,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 223496 states and 1402330 transitions. [2021-05-22 02:19:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:21,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:21,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:21,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-22 02:19:21,735 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1985612620, now seen corresponding path program 4 times [2021-05-22 02:19:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:21,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447807645] [2021-05-22 02:19:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:21,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447807645] [2021-05-22 02:19:21,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447807645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514948715] [2021-05-22 02:19:21,763 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:21,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:19:21,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:21,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:19:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:21,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514948715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:21,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:21,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:19:21,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105852061] [2021-05-22 02:19:21,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:19:21,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:21,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:19:21,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:19:21,874 INFO L87 Difference]: Start difference. First operand 223496 states and 1402330 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:19:28,956 INFO L93 Difference]: Finished difference Result 462426 states and 2827177 transitions. [2021-05-22 02:19:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:19:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:19:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:19:33,088 INFO L225 Difference]: With dead ends: 462426 [2021-05-22 02:19:33,089 INFO L226 Difference]: Without dead ends: 461530 [2021-05-22 02:19:33,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:19:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461530 states. [2021-05-22 02:19:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461530 to 306370. [2021-05-22 02:19:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306370 states, 306369 states have (on average 6.378080027679041) internal successors, (1954046), 306369 states have internal predecessors, (1954046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306370 states to 306370 states and 1954046 transitions. [2021-05-22 02:19:52,997 INFO L78 Accepts]: Start accepts. Automaton has 306370 states and 1954046 transitions. Word has length 33 [2021-05-22 02:19:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:19:52,997 INFO L482 AbstractCegarLoop]: Abstraction has 306370 states and 1954046 transitions. [2021-05-22 02:19:52,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:19:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 306370 states and 1954046 transitions. [2021-05-22 02:19:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:19:55,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:19:55,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:19:56,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:56,109 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:19:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:19:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1914397464, now seen corresponding path program 5 times [2021-05-22 02:19:56,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:19:56,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514197056] [2021-05-22 02:19:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:19:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:19:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:56,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:19:56,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514197056] [2021-05-22 02:19:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514197056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:56,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292397709] [2021-05-22 02:19:56,158 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:19:56,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:19:56,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:19:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:19:56,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:19:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:19:56,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292397709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:19:56,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:19:56,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-22 02:19:56,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195389828] [2021-05-22 02:19:56,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:19:56,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:19:56,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:19:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:19:56,337 INFO L87 Difference]: Start difference. First operand 306370 states and 1954046 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:05,858 INFO L93 Difference]: Finished difference Result 461475 states and 2840923 transitions. [2021-05-22 02:20:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:20:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:11,931 INFO L225 Difference]: With dead ends: 461475 [2021-05-22 02:20:11,931 INFO L226 Difference]: Without dead ends: 461475 [2021-05-22 02:20:11,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461475 states. [2021-05-22 02:20:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461475 to 301660. [2021-05-22 02:20:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301660 states, 301659 states have (on average 6.34969949512529) internal successors, (1915444), 301659 states have internal predecessors, (1915444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301660 states to 301660 states and 1915444 transitions. [2021-05-22 02:20:32,502 INFO L78 Accepts]: Start accepts. Automaton has 301660 states and 1915444 transitions. Word has length 33 [2021-05-22 02:20:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:32,502 INFO L482 AbstractCegarLoop]: Abstraction has 301660 states and 1915444 transitions. [2021-05-22 02:20:32,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 301660 states and 1915444 transitions. [2021-05-22 02:20:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:20:33,904 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:33,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:34,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:34,109 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:34,109 INFO L82 PathProgramCache]: Analyzing trace with hash 947681444, now seen corresponding path program 6 times [2021-05-22 02:20:34,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:34,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153152279] [2021-05-22 02:20:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:34,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:34,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153152279] [2021-05-22 02:20:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153152279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:34,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442534272] [2021-05-22 02:20:34,133 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 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 [2021-05-22 02:20:34,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:20:34,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:34,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:20:34,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442534272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:34,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:34,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-22 02:20:34,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109042012] [2021-05-22 02:20:34,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:20:34,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:20:34,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:34,251 INFO L87 Difference]: Start difference. First operand 301660 states and 1915444 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:41,557 INFO L93 Difference]: Finished difference Result 410582 states and 2520049 transitions. [2021-05-22 02:20:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:20:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:20:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:47,049 INFO L225 Difference]: With dead ends: 410582 [2021-05-22 02:20:47,049 INFO L226 Difference]: Without dead ends: 410350 [2021-05-22 02:20:47,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:20:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410350 states. [2021-05-22 02:21:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410350 to 302246. [2021-05-22 02:21:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302246 states, 302245 states have (on average 6.348105014144155) internal successors, (1918683), 302245 states have internal predecessors, (1918683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302246 states to 302246 states and 1918683 transitions. [2021-05-22 02:21:04,904 INFO L78 Accepts]: Start accepts. Automaton has 302246 states and 1918683 transitions. Word has length 33 [2021-05-22 02:21:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:04,904 INFO L482 AbstractCegarLoop]: Abstraction has 302246 states and 1918683 transitions. [2021-05-22 02:21:04,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 302246 states and 1918683 transitions. [2021-05-22 02:21:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:21:07,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:07,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:07,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-22 02:21:07,220 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1649224646, now seen corresponding path program 7 times [2021-05-22 02:21:07,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:07,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564131352] [2021-05-22 02:21:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:07,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564131352] [2021-05-22 02:21:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564131352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975159199] [2021-05-22 02:21:07,240 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 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 [2021-05-22 02:21:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:21:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975159199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:07,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:07,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-22 02:21:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355822059] [2021-05-22 02:21:07,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:21:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:21:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:21:07,347 INFO L87 Difference]: Start difference. First operand 302246 states and 1918683 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-05-22 02:21:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:14,890 INFO L93 Difference]: Finished difference Result 543501 states and 3319923 transitions. [2021-05-22 02:21:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:21:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:21:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:21,898 INFO L225 Difference]: With dead ends: 543501 [2021-05-22 02:21:21,899 INFO L226 Difference]: Without dead ends: 543501 [2021-05-22 02:21:21,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:21:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543501 states. [2021-05-22 02:21:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543501 to 302246. [2021-05-22 02:21:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302246 states, 302245 states have (on average 6.332521629803636) internal successors, (1913973), 302245 states have internal predecessors, (1913973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302246 states to 302246 states and 1913973 transitions. [2021-05-22 02:21:47,179 INFO L78 Accepts]: Start accepts. Automaton has 302246 states and 1913973 transitions. Word has length 33 [2021-05-22 02:21:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:47,179 INFO L482 AbstractCegarLoop]: Abstraction has 302246 states and 1913973 transitions. [2021-05-22 02:21:47,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-05-22 02:21:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 302246 states and 1913973 transitions. [2021-05-22 02:21:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:21:48,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:48,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:48,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-22 02:21:48,721 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1887188038, now seen corresponding path program 8 times [2021-05-22 02:21:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:48,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833011183] [2021-05-22 02:21:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:48,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:48,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833011183] [2021-05-22 02:21:48,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833011183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:48,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808204214] [2021-05-22 02:21:48,748 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:48,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:21:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:48,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808204214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:48,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:48,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-22 02:21:48,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537638426] [2021-05-22 02:21:48,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:21:48,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:21:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:21:48,850 INFO L87 Difference]: Start difference. First operand 302246 states and 1913973 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:55,612 INFO L93 Difference]: Finished difference Result 447767 states and 2726927 transitions. [2021-05-22 02:21:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:21:55,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:21:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:01,085 INFO L225 Difference]: With dead ends: 447767 [2021-05-22 02:22:01,085 INFO L226 Difference]: Without dead ends: 447543 [2021-05-22 02:22:01,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:22:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447543 states. [2021-05-22 02:22:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447543 to 293050. [2021-05-22 02:22:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293050 states, 293049 states have (on average 6.319526768560889) internal successors, (1851931), 293049 states have internal predecessors, (1851931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293050 states to 293050 states and 1851931 transitions. [2021-05-22 02:22:22,625 INFO L78 Accepts]: Start accepts. Automaton has 293050 states and 1851931 transitions. Word has length 33 [2021-05-22 02:22:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:22,625 INFO L482 AbstractCegarLoop]: Abstraction has 293050 states and 1851931 transitions. [2021-05-22 02:22:22,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 293050 states and 1851931 transitions. [2021-05-22 02:22:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:22:24,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:24,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:24,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:24,913 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -314293450, now seen corresponding path program 9 times [2021-05-22 02:22:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:24,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926964375] [2021-05-22 02:22:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:24,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926964375] [2021-05-22 02:22:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926964375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925327055] [2021-05-22 02:22:24,938 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:24,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:24,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:22:24,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:25,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925327055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:25,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:25,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-22 02:22:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972860072] [2021-05-22 02:22:25,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:22:25,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:22:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:25,063 INFO L87 Difference]: Start difference. First operand 293050 states and 1851931 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:32,965 INFO L93 Difference]: Finished difference Result 554308 states and 3389253 transitions. [2021-05-22 02:22:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:22:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:41,238 INFO L225 Difference]: With dead ends: 554308 [2021-05-22 02:22:41,239 INFO L226 Difference]: Without dead ends: 554308 [2021-05-22 02:22:41,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:42,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554308 states. [2021-05-22 02:22:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554308 to 297760. [2021-05-22 02:23:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297760 states, 297759 states have (on average 6.317568906397455) internal successors, (1881113), 297759 states have internal predecessors, (1881113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297760 states to 297760 states and 1881113 transitions. [2021-05-22 02:23:04,115 INFO L78 Accepts]: Start accepts. Automaton has 297760 states and 1881113 transitions. Word has length 33 [2021-05-22 02:23:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:04,115 INFO L482 AbstractCegarLoop]: Abstraction has 297760 states and 1881113 transitions. [2021-05-22 02:23:04,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 297760 states and 1881113 transitions. [2021-05-22 02:23:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:23:05,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:05,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:05,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-22 02:23:05,614 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1747181838, now seen corresponding path program 10 times [2021-05-22 02:23:05,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:05,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841202515] [2021-05-22 02:23:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:05,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:05,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841202515] [2021-05-22 02:23:05,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841202515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:05,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227450487] [2021-05-22 02:23:05,637 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:05,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:23:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:05,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227450487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:05,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:05,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-05-22 02:23:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734653752] [2021-05-22 02:23:05,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:05,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:05,759 INFO L87 Difference]: Start difference. First operand 297760 states and 1881113 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:12,623 INFO L93 Difference]: Finished difference Result 498176 states and 3017840 transitions. [2021-05-22 02:23:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:23:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,987 INFO L225 Difference]: With dead ends: 498176 [2021-05-22 02:23:19,987 INFO L226 Difference]: Without dead ends: 497944 [2021-05-22 02:23:20,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:23:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497944 states. [2021-05-22 02:23:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497944 to 297760. [2021-05-22 02:23:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297760 states, 297759 states have (on average 6.317192763274997) internal successors, (1881001), 297759 states have internal predecessors, (1881001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297760 states to 297760 states and 1881001 transitions. [2021-05-22 02:23:41,409 INFO L78 Accepts]: Start accepts. Automaton has 297760 states and 1881001 transitions. Word has length 33 [2021-05-22 02:23:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:41,409 INFO L482 AbstractCegarLoop]: Abstraction has 297760 states and 1881001 transitions. [2021-05-22 02:23:41,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 297760 states and 1881001 transitions. [2021-05-22 02:23:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:23:42,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,901 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2074346390, now seen corresponding path program 11 times [2021-05-22 02:23:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869038361] [2021-05-22 02:23:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:42,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869038361] [2021-05-22 02:23:42,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869038361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129175338] [2021-05-22 02:23:42,929 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:23:42,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:23:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129175338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:43,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:23:43,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821760032] [2021-05-22 02:23:43,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:43,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:43,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:43,043 INFO L87 Difference]: Start difference. First operand 297760 states and 1881001 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:50,533 INFO L93 Difference]: Finished difference Result 518884 states and 3204697 transitions. [2021-05-22 02:23:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:23:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,203 INFO L225 Difference]: With dead ends: 518884 [2021-05-22 02:23:57,203 INFO L226 Difference]: Without dead ends: 518884 [2021-05-22 02:23:57,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518884 states. [2021-05-22 02:24:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518884 to 324337. [2021-05-22 02:24:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324337 states, 324336 states have (on average 6.269399634946475) internal successors, (2033392), 324336 states have internal predecessors, (2033392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324337 states to 324337 states and 2033392 transitions. [2021-05-22 02:24:22,161 INFO L78 Accepts]: Start accepts. Automaton has 324337 states and 2033392 transitions. Word has length 33 [2021-05-22 02:24:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:22,161 INFO L482 AbstractCegarLoop]: Abstraction has 324337 states and 2033392 transitions. [2021-05-22 02:24:22,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 324337 states and 2033392 transitions. [2021-05-22 02:24:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:24:23,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:23,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:23,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-22 02:24:23,794 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash 365246792, now seen corresponding path program 12 times [2021-05-22 02:24:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:23,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390344275] [2021-05-22 02:24:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:23,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390344275] [2021-05-22 02:24:23,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390344275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903796435] [2021-05-22 02:24:23,820 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:23,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:24:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-22 02:24:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903796435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:23,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:24:23,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415921338] [2021-05-22 02:24:23,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:24:23,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:23,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:24:23,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:24:23,951 INFO L87 Difference]: Start difference. First operand 324337 states and 2033392 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:31,068 INFO L93 Difference]: Finished difference Result 506455 states and 3046908 transitions. [2021-05-22 02:24:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:24:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:24:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:38,405 INFO L225 Difference]: With dead ends: 506455 [2021-05-22 02:24:38,405 INFO L226 Difference]: Without dead ends: 505759 [2021-05-22 02:24:38,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:24:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505759 states. Received shutdown request... [2021-05-22 02:24:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505759 to 342540. [2021-05-22 02:24:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342540 states, 342539 states have (on average 6.238892505670887) internal successors, (2137064), 342539 states have internal predecessors, (2137064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:55,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-22 02:24:55,873 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:24:55,873 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 02:24:55,876 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-05-22 02:24:55,877 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:24:55,877 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:24:55,877 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:24:55,878 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:24:55,878 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:24:55,878 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:24:55,878 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:24:55,878 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:24:55,879 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 47 transitions, 142 flow [2021-05-22 02:24:55,879 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:24:55,880 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 02:24:55,880 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:24:55,881 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 02:24:55,882 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:24:55 BasicIcfg [2021-05-22 02:24:55,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:24:55,882 INFO L168 Benchmark]: Toolchain (without parser) took 541059.44 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 321.0 MB in the beginning and 10.5 GB in the end (delta: -10.2 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. [2021-05-22 02:24:55,882 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 341.8 MB. Free memory is still 322.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:24:55,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.65 ms. Allocated memory is still 341.8 MB. Free memory was 320.9 MB in the beginning and 319.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:24:55,883 INFO L168 Benchmark]: Boogie Preprocessor took 14.56 ms. Allocated memory is still 341.8 MB. Free memory was 319.4 MB in the beginning and 318.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:24:55,883 INFO L168 Benchmark]: RCFGBuilder took 216.01 ms. Allocated memory is still 341.8 MB. Free memory was 318.2 MB in the beginning and 305.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:24:55,883 INFO L168 Benchmark]: TraceAbstraction took 540802.44 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 305.1 MB in the beginning and 10.5 GB in the end (delta: -10.2 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. [2021-05-22 02:24:55,883 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 0.14 ms. Allocated memory is still 341.8 MB. Free memory is still 322.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.65 ms. Allocated memory is still 341.8 MB. Free memory was 320.9 MB in the beginning and 319.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.56 ms. Allocated memory is still 341.8 MB. Free memory was 319.4 MB in the beginning and 318.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 216.01 ms. Allocated memory is still 341.8 MB. Free memory was 318.2 MB in the beginning and 305.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 540802.44 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 305.1 MB in the beginning and 10.5 GB in the end (delta: -10.2 GB). Peak memory consumption was 5.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 72 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 540681.1ms, OverallIterations: 38, TraceHistogramMax: 2, EmptinessCheckTime: 23534.1ms, AutomataDifference: 200147.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 706.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3122 SDtfs, 7251 SDslu, 7960 SDs, 0 SdLazy, 7047 SolverSat, 259 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4998.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1141 GetRequests, 787 SyntacticMatches, 38 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2119.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=324337occurred in iteration=37, InterpolantAutomatonStates: 355, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 305065.1ms AutomataMinimizationTime, 38 MinimizatonAttempts, 2617749 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 205.2ms SsaConstructionTime, 550.3ms SatisfiabilityAnalysisTime, 3983.4ms InterpolantComputationTime, 2032 NumberOfCodeBlocks, 2032 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 1968 ConstructedInterpolants, 0 QuantifiedInterpolants, 8481 SizeOfPredicates, 81 NumberOfNonLiveVariables, 3041 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 64 InterpolantComputations, 12 PerfectInterpolantSequences, 122/232 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 13 procedures, 72 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown