/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:02:37,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:02:37,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:02:38,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:02:38,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 14:02:38,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:02:38,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:02:38,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:02:38,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:02:38,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:02:38,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:02:38,084 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:02:38,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:02:38,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:02:38,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:02:38,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:02:38,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:02:38,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:02:38,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:02:38,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:02:38,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:02:38,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:02:38,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:02:38,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:02:38,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:02:38,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:02:38,366 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:02:38,367 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:02:38,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-05-03 14:02:38,368 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-05-03 14:02:38,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:02:38,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:02:38,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:02:38,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:02:38,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:02:38,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:02:38,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:02:38,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:02:38,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:02:38,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... [2021-05-03 14:02:38,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:02:38,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:02:38,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:02:38,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:02:38,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:02:38,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:02:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:02:38,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:02:38,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:02:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:02:38,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:02:38,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:02:38,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:02:38,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:02:38,478 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:02:38,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:02:38,626 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 14:02:38,627 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:02:38 BoogieIcfgContainer [2021-05-03 14:02:38,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:02:38,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:02:38,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:02:38,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:02:38,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:02:38" (1/2) ... [2021-05-03 14:02:38,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b271f and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:02:38, skipping insertion in model container [2021-05-03 14:02:38,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:02:38" (2/2) ... [2021-05-03 14:02:38,632 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-05-03 14:02:38,635 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:02:38,635 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:02:38,637 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:02:38,638 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:02:38,691 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:02:38,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:02:38,732 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:02:38,732 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:02:38,732 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:02:38,732 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:02:38,732 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:02:38,732 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:02:38,732 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:02:38,732 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:02:38,743 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-05-03 14:02:38,767 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:02:38,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:38,775 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:38,775 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1314794576, now seen corresponding path program 1 times [2021-05-03 14:02:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:38,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845635676] [2021-05-03 14:02:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:38,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845635676] [2021-05-03 14:02:38,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:38,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:02:38,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021453095] [2021-05-03 14:02:38,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 14:02:38,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:38,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 14:02:38,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:02:38,897 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:38,933 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-05-03 14:02:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:02:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-05-03 14:02:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:38,945 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:02:38,945 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:02:38,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:02:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:02:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-05-03 14:02:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-05-03 14:02:38,996 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-05-03 14:02:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:38,996 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-05-03 14:02:38,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-05-03 14:02:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:02:38,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:38,999 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:38,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:02:38,999 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash 220857976, now seen corresponding path program 1 times [2021-05-03 14:02:39,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534800279] [2021-05-03 14:02:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534800279] [2021-05-03 14:02:39,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:02:39,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591615170] [2021-05-03 14:02:39,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 14:02:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 14:02:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:02:39,023 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:39,031 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-05-03 14:02:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:02:39,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:02:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,032 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:02:39,032 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:02:39,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:02:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:02:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-05-03 14:02:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-05-03 14:02:39,040 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-05-03 14:02:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:39,041 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-05-03 14:02:39,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-05-03 14:02:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:39,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:39,042 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:39,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:02:39,042 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1024512365, now seen corresponding path program 1 times [2021-05-03 14:02:39,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270194317] [2021-05-03 14:02:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270194317] [2021-05-03 14:02:39,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:02:39,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471744997] [2021-05-03 14:02:39,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:02:39,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:02:39,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:02:39,116 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:39,180 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-05-03 14:02:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:02:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,182 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:02:39,182 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:02:39,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:02:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-05-03 14:02:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-05-03 14:02:39,189 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-05-03 14:02:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:39,189 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-05-03 14:02:39,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-05-03 14:02:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:39,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:39,190 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:39,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:02:39,190 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1634430802, now seen corresponding path program 1 times [2021-05-03 14:02:39,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110877458] [2021-05-03 14:02:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110877458] [2021-05-03 14:02:39,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:39,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777610530] [2021-05-03 14:02:39,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:39,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:39,267 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:39,395 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-05-03 14:02:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,398 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:02:39,398 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:02:39,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:02:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:02:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-05-03 14:02:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1607142857142856) internal successors, (242), 112 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-05-03 14:02:39,413 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-05-03 14:02:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:39,413 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-05-03 14:02:39,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-05-03 14:02:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:39,414 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:39,414 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:39,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:02:39,415 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash 123697834, now seen corresponding path program 2 times [2021-05-03 14:02:39,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424593501] [2021-05-03 14:02:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424593501] [2021-05-03 14:02:39,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:39,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5964598] [2021-05-03 14:02:39,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:39,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:39,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:39,481 INFO L87 Difference]: Start difference. First operand 113 states and 242 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:39,577 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-05-03 14:02:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,578 INFO L225 Difference]: With dead ends: 217 [2021-05-03 14:02:39,578 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:02:39,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:02:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-05-03 14:02:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-05-03 14:02:39,595 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-05-03 14:02:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:39,596 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-05-03 14:02:39,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-05-03 14:02:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:39,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:39,599 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:39,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:02:39,599 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1040617061, now seen corresponding path program 2 times [2021-05-03 14:02:39,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242688995] [2021-05-03 14:02:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242688995] [2021-05-03 14:02:39,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:02:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505006309] [2021-05-03 14:02:39,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:02:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:02:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:02:39,677 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:39,732 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-05-03 14:02:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:02:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,734 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:02:39,734 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:02:39,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:02:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-05-03 14:02:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-05-03 14:02:39,739 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-05-03 14:02:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:39,739 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-05-03 14:02:39,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-05-03 14:02:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:39,740 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:39,740 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:39,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:02:39,740 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash -147253063, now seen corresponding path program 3 times [2021-05-03 14:02:39,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330844859] [2021-05-03 14:02:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330844859] [2021-05-03 14:02:39,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:02:39,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459629585] [2021-05-03 14:02:39,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:02:39,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:02:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:02:39,800 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:39,853 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-05-03 14:02:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:02:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,854 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:02:39,854 INFO L226 Difference]: Without dead ends: 186 [2021-05-03 14:02:39,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-03 14:02:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-05-03 14:02:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-05-03 14:02:39,859 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-05-03 14:02:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:39,860 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-05-03 14:02:39,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-05-03 14:02:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:39,860 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:39,860 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:39,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 14:02:39,861 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash -546569092, now seen corresponding path program 3 times [2021-05-03 14:02:39,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:39,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438444587] [2021-05-03 14:02:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:39,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438444587] [2021-05-03 14:02:39,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:39,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:39,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284287785] [2021-05-03 14:02:39,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:39,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:39,939 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,064 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-05-03 14:02:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:02:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,066 INFO L225 Difference]: With dead ends: 217 [2021-05-03 14:02:40,066 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:02:40,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:02:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-05-03 14:02:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.193548387096774) internal successors, (272), 124 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-05-03 14:02:40,070 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-05-03 14:02:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,071 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-05-03 14:02:40,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-05-03 14:02:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,072 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 14:02:40,072 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash 346794906, now seen corresponding path program 4 times [2021-05-03 14:02:40,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385684522] [2021-05-03 14:02:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385684522] [2021-05-03 14:02:40,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581488774] [2021-05-03 14:02:40,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:40,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:40,151 INFO L87 Difference]: Start difference. First operand 125 states and 272 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,297 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-05-03 14:02:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:02:40,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,298 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:02:40,298 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:02:40,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:02:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-05-03 14:02:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-05-03 14:02:40,315 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-05-03 14:02:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,316 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-05-03 14:02:40,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-05-03 14:02:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,316 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 14:02:40,317 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -62451926, now seen corresponding path program 5 times [2021-05-03 14:02:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12988436] [2021-05-03 14:02:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12988436] [2021-05-03 14:02:40,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:40,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621755216] [2021-05-03 14:02:40,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:40,354 INFO L87 Difference]: Start difference. First operand 110 states and 238 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,423 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-05-03 14:02:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,424 INFO L225 Difference]: With dead ends: 164 [2021-05-03 14:02:40,424 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:02:40,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:02:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-05-03 14:02:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-05-03 14:02:40,427 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-05-03 14:02:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,428 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-05-03 14:02:40,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-05-03 14:02:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,428 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,428 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 14:02:40,429 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash -732718852, now seen corresponding path program 6 times [2021-05-03 14:02:40,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405392873] [2021-05-03 14:02:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405392873] [2021-05-03 14:02:40,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:40,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671844341] [2021-05-03 14:02:40,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:40,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:40,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:40,473 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,552 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-05-03 14:02:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,553 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:02:40,553 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:02:40,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:02:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-05-03 14:02:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-05-03 14:02:40,557 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-05-03 14:02:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,558 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-05-03 14:02:40,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-05-03 14:02:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,558 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 14:02:40,559 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 160645146, now seen corresponding path program 7 times [2021-05-03 14:02:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771615737] [2021-05-03 14:02:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771615737] [2021-05-03 14:02:40,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575615376] [2021-05-03 14:02:40,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:40,617 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,698 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-05-03 14:02:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,699 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:02:40,699 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:02:40,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:02:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-05-03 14:02:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-05-03 14:02:40,702 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-05-03 14:02:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,702 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-05-03 14:02:40,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-05-03 14:02:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,703 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,703 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 14:02:40,703 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169953, now seen corresponding path program 4 times [2021-05-03 14:02:40,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735026325] [2021-05-03 14:02:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735026325] [2021-05-03 14:02:40,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:02:40,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229636098] [2021-05-03 14:02:40,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:02:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:02:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:02:40,737 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,789 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-05-03 14:02:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:02:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,790 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:02:40,790 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:02:40,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:02:40,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-05-03 14:02:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-05-03 14:02:40,793 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-05-03 14:02:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,793 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-05-03 14:02:40,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-05-03 14:02:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,793 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,793 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 14:02:40,793 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1156500989, now seen corresponding path program 5 times [2021-05-03 14:02:40,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299180707] [2021-05-03 14:02:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299180707] [2021-05-03 14:02:40,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:02:40,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191365705] [2021-05-03 14:02:40,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:02:40,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:02:40,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:02:40,830 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,888 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-05-03 14:02:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:02:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,889 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:02:40,890 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:02:40,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:02:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-05-03 14:02:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-05-03 14:02:40,900 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-05-03 14:02:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:40,901 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-05-03 14:02:40,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-05-03 14:02:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:40,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:40,901 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:40,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 14:02:40,901 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:40,902 INFO L82 PathProgramCache]: Analyzing trace with hash 774326845, now seen corresponding path program 6 times [2021-05-03 14:02:40,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:40,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431234556] [2021-05-03 14:02:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:40,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431234556] [2021-05-03 14:02:40,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:40,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 14:02:40,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125246304] [2021-05-03 14:02:40,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:02:40,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:40,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:02:40,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:02:40,976 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,020 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-05-03 14:02:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:02:41,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,021 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:02:41,021 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:02:41,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:02:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-05-03 14:02:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-05-03 14:02:41,024 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-05-03 14:02:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,024 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-05-03 14:02:41,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-05-03 14:02:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,025 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 14:02:41,025 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash 498525696, now seen corresponding path program 8 times [2021-05-03 14:02:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843570302] [2021-05-03 14:02:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843570302] [2021-05-03 14:02:41,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418421374] [2021-05-03 14:02:41,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:41,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:41,061 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,123 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-05-03 14:02:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:41,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,124 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:02:41,125 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:02:41,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:02:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-05-03 14:02:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-05-03 14:02:41,127 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-05-03 14:02:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,127 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-05-03 14:02:41,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-05-03 14:02:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,128 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 14:02:41,128 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 9 times [2021-05-03 14:02:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319941458] [2021-05-03 14:02:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319941458] [2021-05-03 14:02:41,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:41,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107285203] [2021-05-03 14:02:41,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:41,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:41,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:41,166 INFO L87 Difference]: Start difference. First operand 99 states and 206 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,245 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-05-03 14:02:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:41,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,246 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:02:41,246 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 14:02:41,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 14:02:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-05-03 14:02:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-05-03 14:02:41,248 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-05-03 14:02:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,249 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-05-03 14:02:41,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-05-03 14:02:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,249 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 14:02:41,249 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944802, now seen corresponding path program 10 times [2021-05-03 14:02:41,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480197794] [2021-05-03 14:02:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480197794] [2021-05-03 14:02:41,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816489890] [2021-05-03 14:02:41,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:41,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:41,285 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,347 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-05-03 14:02:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,348 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:02:41,348 INFO L226 Difference]: Without dead ends: 116 [2021-05-03 14:02:41,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-03 14:02:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-05-03 14:02:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-05-03 14:02:41,350 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-05-03 14:02:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,350 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-05-03 14:02:41,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-05-03 14:02:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,351 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 14:02:41,351 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash 579579668, now seen corresponding path program 1 times [2021-05-03 14:02:41,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301630223] [2021-05-03 14:02:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301630223] [2021-05-03 14:02:41,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573538372] [2021-05-03 14:02:41,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:41,392 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,460 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-05-03 14:02:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:41,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,461 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:02:41,461 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:02:41,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:02:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-05-03 14:02:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-05-03 14:02:41,463 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-05-03 14:02:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,463 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-05-03 14:02:41,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-05-03 14:02:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,464 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,464 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 14:02:41,464 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444461, now seen corresponding path program 1 times [2021-05-03 14:02:41,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794340900] [2021-05-03 14:02:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794340900] [2021-05-03 14:02:41,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049919134] [2021-05-03 14:02:41,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:41,508 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,613 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-05-03 14:02:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:02:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,614 INFO L225 Difference]: With dead ends: 147 [2021-05-03 14:02:41,614 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:02:41,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:02:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:02:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-05-03 14:02:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-05-03 14:02:41,616 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-05-03 14:02:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-05-03 14:02:41,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-05-03 14:02:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,617 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 14:02:41,617 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1727789867, now seen corresponding path program 2 times [2021-05-03 14:02:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259341294] [2021-05-03 14:02:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259341294] [2021-05-03 14:02:41,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:41,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235290809] [2021-05-03 14:02:41,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:41,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:41,661 INFO L87 Difference]: Start difference. First operand 88 states and 181 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,768 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-05-03 14:02:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:41,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,776 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:02:41,776 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:02:41,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:02:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-05-03 14:02:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-05-03 14:02:41,779 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-05-03 14:02:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,779 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-05-03 14:02:41,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-05-03 14:02:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,779 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 14:02:41,780 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash 563474972, now seen corresponding path program 2 times [2021-05-03 14:02:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889226258] [2021-05-03 14:02:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889226258] [2021-05-03 14:02:41,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:41,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115601131] [2021-05-03 14:02:41,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:41,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:41,826 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:41,893 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-05-03 14:02:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:41,895 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:02:41,895 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:02:41,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:02:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-05-03 14:02:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-05-03 14:02:41,898 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-05-03 14:02:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,898 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-05-03 14:02:41,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-05-03 14:02:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:41,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,899 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 14:02:41,899 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1456838970, now seen corresponding path program 3 times [2021-05-03 14:02:41,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014310425] [2021-05-03 14:02:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:41,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014310425] [2021-05-03 14:02:41,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:41,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:41,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133617610] [2021-05-03 14:02:41,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:41,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:41,939 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,017 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-05-03 14:02:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,018 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:02:42,018 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:02:42,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:02:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-05-03 14:02:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.074766355140187) internal successors, (222), 107 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-05-03 14:02:42,021 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-05-03 14:02:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,021 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-05-03 14:02:42,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-05-03 14:02:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,022 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,022 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 14:02:42,022 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1057522941, now seen corresponding path program 3 times [2021-05-03 14:02:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673151660] [2021-05-03 14:02:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673151660] [2021-05-03 14:02:42,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440704134] [2021-05-03 14:02:42,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:42,072 INFO L87 Difference]: Start difference. First operand 108 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,176 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-05-03 14:02:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:02:42,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,177 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:02:42,177 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:02:42,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:02:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:02:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-05-03 14:02:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-03 14:02:42,180 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-05-03 14:02:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,180 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-03 14:02:42,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-03 14:02:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,181 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,181 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 14:02:42,181 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1950886939, now seen corresponding path program 4 times [2021-05-03 14:02:42,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913236458] [2021-05-03 14:02:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913236458] [2021-05-03 14:02:42,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116359300] [2021-05-03 14:02:42,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:42,224 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,341 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-05-03 14:02:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:02:42,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,342 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:02:42,342 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:02:42,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:02:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:02:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-05-03 14:02:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-05-03 14:02:42,344 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-05-03 14:02:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,344 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-05-03 14:02:42,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-05-03 14:02:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,344 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,344 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 14:02:42,345 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash 460332689, now seen corresponding path program 5 times [2021-05-03 14:02:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563731048] [2021-05-03 14:02:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563731048] [2021-05-03 14:02:42,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:42,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270071100] [2021-05-03 14:02:42,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:42,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:42,389 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,491 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-05-03 14:02:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,492 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:02:42,492 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:02:42,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:02:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-05-03 14:02:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-05-03 14:02:42,495 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-05-03 14:02:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,496 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-05-03 14:02:42,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-05-03 14:02:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,496 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 14:02:42,496 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash -209934237, now seen corresponding path program 6 times [2021-05-03 14:02:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509900317] [2021-05-03 14:02:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509900317] [2021-05-03 14:02:42,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:42,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735421313] [2021-05-03 14:02:42,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:42,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:42,537 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,630 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-05-03 14:02:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,631 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:02:42,631 INFO L226 Difference]: Without dead ends: 182 [2021-05-03 14:02:42,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-03 14:02:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-05-03 14:02:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-05-03 14:02:42,634 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-05-03 14:02:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,634 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-05-03 14:02:42,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-05-03 14:02:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,634 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,634 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 14:02:42,634 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash 683429761, now seen corresponding path program 7 times [2021-05-03 14:02:42,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438907164] [2021-05-03 14:02:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438907164] [2021-05-03 14:02:42,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:42,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970131620] [2021-05-03 14:02:42,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:42,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:42,681 INFO L87 Difference]: Start difference. First operand 131 states and 278 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,778 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-05-03 14:02:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,779 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:02:42,779 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:02:42,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:02:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-05-03 14:02:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-05-03 14:02:42,782 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-05-03 14:02:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,782 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-05-03 14:02:42,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-05-03 14:02:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,783 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 14:02:42,783 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649044, now seen corresponding path program 4 times [2021-05-03 14:02:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316070517] [2021-05-03 14:02:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316070517] [2021-05-03 14:02:42,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:42,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625605711] [2021-05-03 14:02:42,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:42,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:42,821 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,890 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-05-03 14:02:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:42,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,891 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:02:42,891 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:02:42,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:02:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-05-03 14:02:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-05-03 14:02:42,895 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-05-03 14:02:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,895 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-05-03 14:02:42,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-05-03 14:02:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,896 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 14:02:42,896 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120054, now seen corresponding path program 5 times [2021-05-03 14:02:42,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175093257] [2021-05-03 14:02:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175093257] [2021-05-03 14:02:42,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:42,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167738739] [2021-05-03 14:02:42,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:42,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:42,928 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:42,988 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-05-03 14:02:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:42,989 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:02:42,989 INFO L226 Difference]: Without dead ends: 173 [2021-05-03 14:02:42,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-03 14:02:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-05-03 14:02:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-05-03 14:02:42,992 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-05-03 14:02:42,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,992 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-05-03 14:02:42,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-05-03 14:02:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:42,993 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,993 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 14:02:42,993 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483244, now seen corresponding path program 6 times [2021-05-03 14:02:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300245082] [2021-05-03 14:02:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300245082] [2021-05-03 14:02:43,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:43,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624945915] [2021-05-03 14:02:43,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:43,027 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:43,092 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-05-03 14:02:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:43,093 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:02:43,093 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:02:43,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:02:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-05-03 14:02:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-05-03 14:02:43,096 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-05-03 14:02:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:43,096 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-05-03 14:02:43,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-05-03 14:02:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:43,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:43,096 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:43,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 14:02:43,097 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash -493733101, now seen corresponding path program 8 times [2021-05-03 14:02:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:43,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972551060] [2021-05-03 14:02:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972551060] [2021-05-03 14:02:43,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:43,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234821821] [2021-05-03 14:02:43,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:43,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:43,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:43,138 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:43,242 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-05-03 14:02:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:02:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:43,243 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:02:43,243 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:02:43,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:02:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:02:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-05-03 14:02:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-05-03 14:02:43,246 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-05-03 14:02:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:43,246 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-05-03 14:02:43,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-05-03 14:02:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:43,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:43,246 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:43,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 14:02:43,246 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash -169262091, now seen corresponding path program 9 times [2021-05-03 14:02:43,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:43,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478532401] [2021-05-03 14:02:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478532401] [2021-05-03 14:02:43,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:43,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993647545] [2021-05-03 14:02:43,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:43,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:43,284 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:43,392 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-05-03 14:02:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:02:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:43,393 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:02:43,393 INFO L226 Difference]: Without dead ends: 157 [2021-05-03 14:02:43,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:02:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-03 14:02:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-05-03 14:02:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-05-03 14:02:43,396 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-05-03 14:02:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:43,396 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-05-03 14:02:43,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-05-03 14:02:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:43,397 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:43,397 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:43,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 14:02:43,397 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 724101907, now seen corresponding path program 10 times [2021-05-03 14:02:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:43,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223076484] [2021-05-03 14:02:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223076484] [2021-05-03 14:02:43,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:43,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363239351] [2021-05-03 14:02:43,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:43,442 INFO L87 Difference]: Start difference. First operand 107 states and 213 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:43,567 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-05-03 14:02:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:02:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:43,568 INFO L225 Difference]: With dead ends: 155 [2021-05-03 14:02:43,568 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:02:43,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:02:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:02:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-05-03 14:02:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-05-03 14:02:43,571 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-05-03 14:02:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:43,571 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-05-03 14:02:43,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-05-03 14:02:43,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:43,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:43,571 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:43,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 14:02:43,571 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 283747689, now seen corresponding path program 11 times [2021-05-03 14:02:43,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:43,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711213116] [2021-05-03 14:02:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711213116] [2021-05-03 14:02:43,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:43,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868215613] [2021-05-03 14:02:43,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:43,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:43,610 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:43,707 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-05-03 14:02:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:43,708 INFO L225 Difference]: With dead ends: 110 [2021-05-03 14:02:43,708 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 14:02:43,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 14:02:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-05-03 14:02:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-05-03 14:02:43,710 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-05-03 14:02:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:43,710 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-05-03 14:02:43,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-05-03 14:02:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:43,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:43,710 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:43,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 14:02:43,710 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash -386519237, now seen corresponding path program 12 times [2021-05-03 14:02:43,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:43,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670125741] [2021-05-03 14:02:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670125741] [2021-05-03 14:02:43,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:43,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961189587] [2021-05-03 14:02:43,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:43,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:43,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:43,769 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:43,878 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-05-03 14:02:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:43,879 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:02:43,879 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:02:43,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:02:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-05-03 14:02:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-05-03 14:02:43,881 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-05-03 14:02:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:43,881 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-05-03 14:02:43,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-05-03 14:02:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:43,881 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:43,881 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:43,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 14:02:43,882 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash 506844761, now seen corresponding path program 13 times [2021-05-03 14:02:43,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:43,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100216279] [2021-05-03 14:02:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:43,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100216279] [2021-05-03 14:02:43,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:43,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:43,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804262909] [2021-05-03 14:02:43,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:43,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:43,927 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,015 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-05-03 14:02:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,015 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:02:44,015 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 14:02:44,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 14:02:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-05-03 14:02:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-05-03 14:02:44,017 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-05-03 14:02:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,017 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-05-03 14:02:44,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-05-03 14:02:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 14:02:44,018 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,018 INFO L82 PathProgramCache]: Analyzing trace with hash -670318101, now seen corresponding path program 14 times [2021-05-03 14:02:44,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138040368] [2021-05-03 14:02:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138040368] [2021-05-03 14:02:44,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:44,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891656458] [2021-05-03 14:02:44,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:44,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:44,063 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,152 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-05-03 14:02:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,153 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:02:44,153 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 14:02:44,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 14:02:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-05-03 14:02:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-05-03 14:02:44,155 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-05-03 14:02:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,155 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-05-03 14:02:44,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-05-03 14:02:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,155 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 14:02:44,156 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,156 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 15 times [2021-05-03 14:02:44,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657848160] [2021-05-03 14:02:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657848160] [2021-05-03 14:02:44,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:44,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859408265] [2021-05-03 14:02:44,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:44,200 INFO L87 Difference]: Start difference. First operand 68 states and 124 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,284 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-05-03 14:02:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,284 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:02:44,284 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 14:02:44,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 14:02:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-05-03 14:02:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.838235294117647) internal successors, (125), 68 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-05-03 14:02:44,286 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-05-03 14:02:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,286 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-05-03 14:02:44,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-05-03 14:02:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,287 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 14:02:44,287 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,287 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 16 times [2021-05-03 14:02:44,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931180022] [2021-05-03 14:02:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931180022] [2021-05-03 14:02:44,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:44,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886084303] [2021-05-03 14:02:44,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:44,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:44,327 INFO L87 Difference]: Start difference. First operand 69 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,423 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-05-03 14:02:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:44,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,423 INFO L225 Difference]: With dead ends: 89 [2021-05-03 14:02:44,423 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 14:02:44,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 14:02:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-03 14:02:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-05-03 14:02:44,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-05-03 14:02:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,425 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-05-03 14:02:44,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-05-03 14:02:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,426 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-03 14:02:44,426 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620800, now seen corresponding path program 7 times [2021-05-03 14:02:44,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063699270] [2021-05-03 14:02:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063699270] [2021-05-03 14:02:44,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:44,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200295231] [2021-05-03 14:02:44,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:44,463 INFO L87 Difference]: Start difference. First operand 46 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,526 INFO L93 Difference]: Finished difference Result 109 states and 168 transitions. [2021-05-03 14:02:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,526 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:02:44,526 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 14:02:44,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 14:02:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-05-03 14:02:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.64) internal successors, (82), 50 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 82 transitions. [2021-05-03 14:02:44,528 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 82 transitions. Word has length 18 [2021-05-03 14:02:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,528 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 82 transitions. [2021-05-03 14:02:44,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 82 transitions. [2021-05-03 14:02:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,528 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 14:02:44,528 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454498, now seen corresponding path program 8 times [2021-05-03 14:02:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373286484] [2021-05-03 14:02:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373286484] [2021-05-03 14:02:44,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:44,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790633778] [2021-05-03 14:02:44,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:44,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:44,568 INFO L87 Difference]: Start difference. First operand 51 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,629 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-05-03 14:02:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,630 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:02:44,630 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:02:44,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:02:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2021-05-03 14:02:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 83 transitions. [2021-05-03 14:02:44,632 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 83 transitions. Word has length 18 [2021-05-03 14:02:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,632 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 83 transitions. [2021-05-03 14:02:44,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2021-05-03 14:02:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,633 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 14:02:44,633 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148800, now seen corresponding path program 9 times [2021-05-03 14:02:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429812406] [2021-05-03 14:02:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429812406] [2021-05-03 14:02:44,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337911053] [2021-05-03 14:02:44,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:44,669 INFO L87 Difference]: Start difference. First operand 52 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,728 INFO L93 Difference]: Finished difference Result 92 states and 139 transitions. [2021-05-03 14:02:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,729 INFO L225 Difference]: With dead ends: 92 [2021-05-03 14:02:44,729 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 14:02:44,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 14:02:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-05-03 14:02:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-05-03 14:02:44,730 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 18 [2021-05-03 14:02:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,730 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-05-03 14:02:44,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-05-03 14:02:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,730 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,731 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-03 14:02:44,731 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572320, now seen corresponding path program 10 times [2021-05-03 14:02:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622821443] [2021-05-03 14:02:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622821443] [2021-05-03 14:02:44,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:02:44,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264259619] [2021-05-03 14:02:44,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:02:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:02:44,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:02:44,766 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,828 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2021-05-03 14:02:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:02:44,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,829 INFO L225 Difference]: With dead ends: 63 [2021-05-03 14:02:44,829 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 14:02:44,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:02:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 14:02:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-05-03 14:02:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-05-03 14:02:44,830 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-05-03 14:02:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,830 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-05-03 14:02:44,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-05-03 14:02:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,830 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-03 14:02:44,830 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 17 times [2021-05-03 14:02:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608592965] [2021-05-03 14:02:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608592965] [2021-05-03 14:02:44,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:44,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:44,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184434068] [2021-05-03 14:02:44,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:44,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:44,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:44,870 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:44,960 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-05-03 14:02:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:44,961 INFO L225 Difference]: With dead ends: 71 [2021-05-03 14:02:44,961 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 14:02:44,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 14:02:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-05-03 14:02:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-05-03 14:02:44,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 18 [2021-05-03 14:02:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:44,962 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-05-03 14:02:44,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-05-03 14:02:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:44,963 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:44,963 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:44,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 14:02:44,963 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 18 times [2021-05-03 14:02:44,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:44,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215559469] [2021-05-03 14:02:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:45,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215559469] [2021-05-03 14:02:45,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:45,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:45,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509691669] [2021-05-03 14:02:45,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:45,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:45,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:45,007 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:45,081 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-03 14:02:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:45,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:45,081 INFO L225 Difference]: With dead ends: 63 [2021-05-03 14:02:45,081 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 14:02:45,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 14:02:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-03 14:02:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2021-05-03 14:02:45,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2021-05-03 14:02:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:45,083 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2021-05-03 14:02:45,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2021-05-03 14:02:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:45,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:45,083 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:45,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-03 14:02:45,083 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 19 times [2021-05-03 14:02:45,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:45,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771975362] [2021-05-03 14:02:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771975362] [2021-05-03 14:02:45,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:45,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:45,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505833285] [2021-05-03 14:02:45,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:45,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:45,135 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:45,225 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-03 14:02:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:45,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:45,225 INFO L225 Difference]: With dead ends: 52 [2021-05-03 14:02:45,225 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 14:02:45,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 14:02:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-05-03 14:02:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2021-05-03 14:02:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-05-03 14:02:45,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 18 [2021-05-03 14:02:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:45,227 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-05-03 14:02:45,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-05-03 14:02:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:02:45,227 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:45,227 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:45,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-03 14:02:45,227 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash -974982143, now seen corresponding path program 20 times [2021-05-03 14:02:45,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:45,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861939360] [2021-05-03 14:02:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:45,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861939360] [2021-05-03 14:02:45,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:02:45,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:02:45,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000790601] [2021-05-03 14:02:45,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:45,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:45,275 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:45,346 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-05-03 14:02:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:02:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:02:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:45,347 INFO L225 Difference]: With dead ends: 33 [2021-05-03 14:02:45,347 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 14:02:45,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 14:02:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 14:02:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 14:02:45,348 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-05-03 14:02:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:45,348 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 14:02:45,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 14:02:45,348 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 14:02:45,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 14:02:45,351 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:02:45 BasicIcfg [2021-05-03 14:02:45,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:02:45,351 INFO L168 Benchmark]: Toolchain (without parser) took 6960.34 ms. Allocated memory was 373.3 MB in the beginning and 448.8 MB in the end (delta: 75.5 MB). Free memory was 353.3 MB in the beginning and 293.4 MB in the end (delta: 59.9 MB). Peak memory consumption was 137.4 MB. Max. memory is 16.0 GB. [2021-05-03 14:02:45,351 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 373.3 MB. Free memory is still 354.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:02:45,352 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.76 ms. Allocated memory is still 373.3 MB. Free memory was 353.3 MB in the beginning and 351.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:02:45,352 INFO L168 Benchmark]: Boogie Preprocessor took 8.75 ms. Allocated memory is still 373.3 MB. Free memory was 351.8 MB in the beginning and 350.9 MB in the end (delta: 917.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:02:45,352 INFO L168 Benchmark]: RCFGBuilder took 202.40 ms. Allocated memory is still 373.3 MB. Free memory was 350.9 MB in the beginning and 340.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-03 14:02:45,352 INFO L168 Benchmark]: TraceAbstraction took 6722.77 ms. Allocated memory was 373.3 MB in the beginning and 448.8 MB in the end (delta: 75.5 MB). Free memory was 340.0 MB in the beginning and 293.4 MB in the end (delta: 46.6 MB). Peak memory consumption was 122.7 MB. Max. memory is 16.0 GB. [2021-05-03 14:02:45,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 373.3 MB. Free memory is still 354.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.76 ms. Allocated memory is still 373.3 MB. Free memory was 353.3 MB in the beginning and 351.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.75 ms. Allocated memory is still 373.3 MB. Free memory was 351.8 MB in the beginning and 350.9 MB in the end (delta: 917.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 202.40 ms. Allocated memory is still 373.3 MB. Free memory was 350.9 MB in the beginning and 340.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6722.77 ms. Allocated memory was 373.3 MB in the beginning and 448.8 MB in the end (delta: 75.5 MB). Free memory was 340.0 MB in the beginning and 293.4 MB in the end (delta: 46.6 MB). Peak memory consumption was 122.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6618.0ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 25.9ms, AutomataDifference: 4024.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2185 SDtfs, 3031 SDslu, 6767 SDs, 0 SdLazy, 2178 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 989.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 560 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3737.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 357, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 197.0ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1682 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.9ms SsaConstructionTime, 96.0ms SatisfiabilityAnalysisTime, 1964.7ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5483 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...