/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 18:21:40,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 18:21:40,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 18:21:40,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 18:21:40,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 18:21:40,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 18:21:40,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 18:21:40,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 18:21:40,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 18:21:40,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 18:21:40,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 18:21:40,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 18:21:40,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 18:21:40,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 18:21:40,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 18:21:40,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 18:21:40,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 18:21:40,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 18:21:40,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 18:21:40,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 18:21:40,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 18:21:40,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 18:21:40,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 18:21:40,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 18:21:40,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 18:21:40,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 18:21:40,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 18:21:40,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 18:21:40,141 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-SemanticLbe.epf [2021-03-11 18:21:40,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 18:21:40,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 18:21:40,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 18:21:40,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 18:21:40,171 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 18:21:40,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 18:21:40,171 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 18:21:40,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 18:21:40,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 18:21:40,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 18:21:40,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 18:21:40,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 18:21:40,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 18:21:40,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 18:21:40,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 18:21:40,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 18:21:40,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 18:21:40,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 18:21:40,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 18:21:40,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 18:21:40,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 18:21:40,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 18:21:40,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 18:21:40,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 18:21:40,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 18:21:40,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 18:21:40,468 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 18:21:40,469 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 18:21:40,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-03-11 18:21:40,469 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-03-11 18:21:40,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 18:21:40,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 18:21:40,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 18:21:40,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 18:21:40,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 18:21:40,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 18:21:40,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 18:21:40,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 18:21:40,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 18:21:40,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/1) ... [2021-03-11 18:21:40,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 18:21:40,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 18:21:40,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 18:21:40,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 18:21:40,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (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 [2021-03-11 18:21:40,622 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 18:21:40,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 18:21:40,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 18:21:40,623 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 18:21:40,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 18:21:40,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 18:21:40,624 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 18:21:40,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 18:21:40,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 18:21:40,624 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 18:21:40,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 18:21:40,764 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 18:21:40,765 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:21:40 BoogieIcfgContainer [2021-03-11 18:21:40,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 18:21:40,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 18:21:40,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 18:21:40,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 18:21:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:21:40" (1/2) ... [2021-03-11 18:21:40,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110a3010 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:21:40, skipping insertion in model container [2021-03-11 18:21:40,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:21:40" (2/2) ... [2021-03-11 18:21:40,769 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-03-11 18:21:40,773 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 18:21:40,773 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 18:21:40,783 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 18:21:40,783 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 18:21:40,805 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 18:21:40,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 18:21:40,828 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 18:21:40,828 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 18:21:40,828 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 18:21:40,829 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 18:21:40,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 18:21:40,829 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 18:21:40,829 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 18:21:40,829 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 18:21:40,844 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 18:21:40,855 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 35 transitions, 86 flow [2021-03-11 18:21:40,857 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 35 transitions, 86 flow [2021-03-11 18:21:40,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2021-03-11 18:21:40,891 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-03-11 18:21:40,891 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 18:21:40,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 0/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 18:21:40,894 INFO L116 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-11 18:21:41,215 INFO L131 LiptonReduction]: Checked pairs total: 942 [2021-03-11 18:21:41,215 INFO L133 LiptonReduction]: Total number of compositions: 13 [2021-03-11 18:21:41,223 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 23 transitions, 62 flow [2021-03-11 18:21:41,237 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 85 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 84 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 84 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:41,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:41,247 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:41,248 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2046982427, now seen corresponding path program 1 times [2021-03-11 18:21:41,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:41,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842383550] [2021-03-11 18:21:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:41,388 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,413 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,424 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-11 18:21:41,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:41,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842383550] [2021-03-11 18:21:41,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:41,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 18:21:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232623192] [2021-03-11 18:21:41,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 18:21:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 18:21:41,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 18:21:41,461 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7710843373493976) internal successors, (147), 84 states have internal predecessors, (147), 0 states have call successors, (0), 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 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:41,561 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2021-03-11 18:21:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 18:21:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:41,569 INFO L225 Difference]: With dead ends: 112 [2021-03-11 18:21:41,570 INFO L226 Difference]: Without dead ends: 85 [2021-03-11 18:21:41,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 18:21:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-11 18:21:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-03-11 18:21:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.696969696969697) internal successors, (112), 66 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 112 transitions. [2021-03-11 18:21:41,604 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 112 transitions. Word has length 20 [2021-03-11 18:21:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:41,605 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 112 transitions. [2021-03-11 18:21:41,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 112 transitions. [2021-03-11 18:21:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:41,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:41,606 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:41,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 18:21:41,607 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1590695529, now seen corresponding path program 2 times [2021-03-11 18:21:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:41,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447628098] [2021-03-11 18:21:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:41,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 18:21:41,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 18:21:41,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 18:21:41,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 18:21:41,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:41,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447628098] [2021-03-11 18:21:41,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:41,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 18:21:41,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407217410] [2021-03-11 18:21:41,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 18:21:41,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 18:21:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-11 18:21:41,683 INFO L87 Difference]: Start difference. First operand 67 states and 112 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:41,763 INFO L93 Difference]: Finished difference Result 136 states and 222 transitions. [2021-03-11 18:21:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 18:21:41,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:41,765 INFO L225 Difference]: With dead ends: 136 [2021-03-11 18:21:41,765 INFO L226 Difference]: Without dead ends: 116 [2021-03-11 18:21:41,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-11 18:21:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-11 18:21:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2021-03-11 18:21:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 58 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 96 transitions. [2021-03-11 18:21:41,775 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 96 transitions. Word has length 20 [2021-03-11 18:21:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:41,776 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 96 transitions. [2021-03-11 18:21:41,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 96 transitions. [2021-03-11 18:21:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:41,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:41,777 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:41,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 18:21:41,777 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:41,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1127481283, now seen corresponding path program 3 times [2021-03-11 18:21:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:41,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079649040] [2021-03-11 18:21:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:41,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,872 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-11 18:21:41,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:41,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079649040] [2021-03-11 18:21:41,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:41,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 18:21:41,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003149821] [2021-03-11 18:21:41,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 18:21:41,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:41,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 18:21:41,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 18:21:41,884 INFO L87 Difference]: Start difference. First operand 59 states and 96 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:41,950 INFO L93 Difference]: Finished difference Result 76 states and 116 transitions. [2021-03-11 18:21:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 18:21:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:41,953 INFO L225 Difference]: With dead ends: 76 [2021-03-11 18:21:41,953 INFO L226 Difference]: Without dead ends: 57 [2021-03-11 18:21:41,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 18:21:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-03-11 18:21:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-03-11 18:21:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 76 transitions. [2021-03-11 18:21:41,963 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 76 transitions. Word has length 20 [2021-03-11 18:21:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:41,963 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 76 transitions. [2021-03-11 18:21:41,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 76 transitions. [2021-03-11 18:21:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:41,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:41,968 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:41,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 18:21:41,968 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 480056995, now seen corresponding path program 4 times [2021-03-11 18:21:41,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:41,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054656930] [2021-03-11 18:21:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:41,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:41,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:41,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,027 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-11 18:21:42,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054656930] [2021-03-11 18:21:42,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536385670] [2021-03-11 18:21:42,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:42,042 INFO L87 Difference]: Start difference. First operand 49 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,147 INFO L93 Difference]: Finished difference Result 154 states and 239 transitions. [2021-03-11 18:21:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 18:21:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,149 INFO L225 Difference]: With dead ends: 154 [2021-03-11 18:21:42,149 INFO L226 Difference]: Without dead ends: 150 [2021-03-11 18:21:42,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-11 18:21:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 56. [2021-03-11 18:21:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2021-03-11 18:21:42,156 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 20 [2021-03-11 18:21:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,156 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2021-03-11 18:21:42,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2021-03-11 18:21:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,157 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 18:21:42,157 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1077931683, now seen corresponding path program 5 times [2021-03-11 18:21:42,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535063304] [2021-03-11 18:21:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535063304] [2021-03-11 18:21:42,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:42,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483604773] [2021-03-11 18:21:42,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:42,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:42,253 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,361 INFO L93 Difference]: Finished difference Result 154 states and 237 transitions. [2021-03-11 18:21:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 18:21:42,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,369 INFO L225 Difference]: With dead ends: 154 [2021-03-11 18:21:42,369 INFO L226 Difference]: Without dead ends: 146 [2021-03-11 18:21:42,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-11 18:21:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 52. [2021-03-11 18:21:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2021-03-11 18:21:42,378 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 20 [2021-03-11 18:21:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,378 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2021-03-11 18:21:42,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2021-03-11 18:21:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,379 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 18:21:42,379 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2004697757, now seen corresponding path program 6 times [2021-03-11 18:21:42,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613498345] [2021-03-11 18:21:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613498345] [2021-03-11 18:21:42,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 18:21:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107308085] [2021-03-11 18:21:42,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 18:21:42,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 18:21:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 18:21:42,403 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,406 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2021-03-11 18:21:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 18:21:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,406 INFO L225 Difference]: With dead ends: 48 [2021-03-11 18:21:42,406 INFO L226 Difference]: Without dead ends: 47 [2021-03-11 18:21:42,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 18:21:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-03-11 18:21:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-03-11 18:21:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 46 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 71 transitions. [2021-03-11 18:21:42,409 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 71 transitions. Word has length 20 [2021-03-11 18:21:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,409 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 71 transitions. [2021-03-11 18:21:42,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 71 transitions. [2021-03-11 18:21:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,411 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 18:21:42,411 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash -57435861, now seen corresponding path program 7 times [2021-03-11 18:21:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278019129] [2021-03-11 18:21:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 18:21:42,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278019129] [2021-03-11 18:21:42,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:42,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941695534] [2021-03-11 18:21:42,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:42,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:42,483 INFO L87 Difference]: Start difference. First operand 47 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,568 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2021-03-11 18:21:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 18:21:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,569 INFO L225 Difference]: With dead ends: 124 [2021-03-11 18:21:42,569 INFO L226 Difference]: Without dead ends: 120 [2021-03-11 18:21:42,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-11 18:21:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 53. [2021-03-11 18:21:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 52 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 81 transitions. [2021-03-11 18:21:42,571 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 81 transitions. Word has length 20 [2021-03-11 18:21:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,571 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 81 transitions. [2021-03-11 18:21:42,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 81 transitions. [2021-03-11 18:21:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,571 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 18:21:42,572 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 540438827, now seen corresponding path program 8 times [2021-03-11 18:21:42,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180789801] [2021-03-11 18:21:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,584 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,608 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-11 18:21:42,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 18:21:42,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180789801] [2021-03-11 18:21:42,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874790363] [2021-03-11 18:21:42,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:42,619 INFO L87 Difference]: Start difference. First operand 53 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,724 INFO L93 Difference]: Finished difference Result 113 states and 167 transitions. [2021-03-11 18:21:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 18:21:42,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,725 INFO L225 Difference]: With dead ends: 113 [2021-03-11 18:21:42,725 INFO L226 Difference]: Without dead ends: 105 [2021-03-11 18:21:42,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-11 18:21:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 49. [2021-03-11 18:21:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 48 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2021-03-11 18:21:42,727 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 20 [2021-03-11 18:21:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,728 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2021-03-11 18:21:42,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2021-03-11 18:21:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,729 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 18:21:42,729 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1084405325, now seen corresponding path program 9 times [2021-03-11 18:21:42,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788047371] [2021-03-11 18:21:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788047371] [2021-03-11 18:21:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 18:21:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604957508] [2021-03-11 18:21:42,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 18:21:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 18:21:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 18:21:42,750 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,753 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2021-03-11 18:21:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 18:21:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,753 INFO L225 Difference]: With dead ends: 48 [2021-03-11 18:21:42,753 INFO L226 Difference]: Without dead ends: 44 [2021-03-11 18:21:42,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 18:21:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-03-11 18:21:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-03-11 18:21:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 65 transitions. [2021-03-11 18:21:42,755 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 65 transitions. Word has length 20 [2021-03-11 18:21:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,755 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 65 transitions. [2021-03-11 18:21:42,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 65 transitions. [2021-03-11 18:21:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,756 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 18:21:42,756 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash 968685115, now seen corresponding path program 10 times [2021-03-11 18:21:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27713350] [2021-03-11 18:21:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,818 INFO L142 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-03-11 18:21:42,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27713350] [2021-03-11 18:21:42,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:42,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907451471] [2021-03-11 18:21:42,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:42,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:42,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:42,828 INFO L87 Difference]: Start difference. First operand 44 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:42,907 INFO L93 Difference]: Finished difference Result 63 states and 95 transitions. [2021-03-11 18:21:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 18:21:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:42,908 INFO L225 Difference]: With dead ends: 63 [2021-03-11 18:21:42,908 INFO L226 Difference]: Without dead ends: 59 [2021-03-11 18:21:42,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-03-11 18:21:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-03-11 18:21:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 47 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 71 transitions. [2021-03-11 18:21:42,914 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 71 transitions. Word has length 20 [2021-03-11 18:21:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:42,914 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 71 transitions. [2021-03-11 18:21:42,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 71 transitions. [2021-03-11 18:21:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:42,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:42,915 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:42,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 18:21:42,915 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1566559803, now seen corresponding path program 11 times [2021-03-11 18:21:42,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:42,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279210275] [2021-03-11 18:21:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:42,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:42,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:42,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:42,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279210275] [2021-03-11 18:21:42,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:42,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:42,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515512944] [2021-03-11 18:21:42,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:42,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:42,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:42,963 INFO L87 Difference]: Start difference. First operand 48 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:43,042 INFO L93 Difference]: Finished difference Result 52 states and 75 transitions. [2021-03-11 18:21:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 18:21:43,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:43,043 INFO L225 Difference]: With dead ends: 52 [2021-03-11 18:21:43,044 INFO L226 Difference]: Without dead ends: 43 [2021-03-11 18:21:43,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-11 18:21:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-03-11 18:21:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2021-03-11 18:21:43,046 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 20 [2021-03-11 18:21:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:43,046 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2021-03-11 18:21:43,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2021-03-11 18:21:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:43,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:43,046 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:43,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 18:21:43,046 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 431192259, now seen corresponding path program 12 times [2021-03-11 18:21:43,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:43,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660992394] [2021-03-11 18:21:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:43,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,064 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,071 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,082 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 18:21:43,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:43,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660992394] [2021-03-11 18:21:43,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:43,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548536146] [2021-03-11 18:21:43,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:43,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:43,100 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:43,187 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2021-03-11 18:21:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 18:21:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:43,188 INFO L225 Difference]: With dead ends: 67 [2021-03-11 18:21:43,188 INFO L226 Difference]: Without dead ends: 63 [2021-03-11 18:21:43,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-11 18:21:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2021-03-11 18:21:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 47 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 70 transitions. [2021-03-11 18:21:43,190 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 70 transitions. Word has length 20 [2021-03-11 18:21:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:43,190 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 70 transitions. [2021-03-11 18:21:43,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 70 transitions. [2021-03-11 18:21:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:43,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:43,190 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:43,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 18:21:43,191 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1029066947, now seen corresponding path program 13 times [2021-03-11 18:21:43,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:43,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145971866] [2021-03-11 18:21:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:43,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,207 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,225 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-03-11 18:21:43,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 18:21:43,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:43,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145971866] [2021-03-11 18:21:43,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:43,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 18:21:43,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28178232] [2021-03-11 18:21:43,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 18:21:43,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 18:21:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-11 18:21:43,234 INFO L87 Difference]: Start difference. First operand 48 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:43,309 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2021-03-11 18:21:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 18:21:43,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:43,310 INFO L225 Difference]: With dead ends: 52 [2021-03-11 18:21:43,310 INFO L226 Difference]: Without dead ends: 42 [2021-03-11 18:21:43,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-11 18:21:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-03-11 18:21:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-03-11 18:21:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 61 transitions. [2021-03-11 18:21:43,312 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 61 transitions. Word has length 20 [2021-03-11 18:21:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:43,312 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 61 transitions. [2021-03-11 18:21:43,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 61 transitions. [2021-03-11 18:21:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 18:21:43,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 18:21:43,312 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 18:21:43,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 18:21:43,312 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 18:21:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 18:21:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2091714821, now seen corresponding path program 14 times [2021-03-11 18:21:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 18:21:43,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894008737] [2021-03-11 18:21:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 18:21:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 18:21:43,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 18:21:43,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 18:21:43,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 18:21:43,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 18:21:43,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 18:21:43,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 18:21:43,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 18:21:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 18:21:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894008737] [2021-03-11 18:21:43,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 18:21:43,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 18:21:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810050937] [2021-03-11 18:21:43,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 18:21:43,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 18:21:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 18:21:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-11 18:21:43,347 INFO L87 Difference]: Start difference. First operand 42 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 18:21:43,377 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2021-03-11 18:21:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 18:21:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-03-11 18:21:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 18:21:43,378 INFO L225 Difference]: With dead ends: 21 [2021-03-11 18:21:43,378 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 18:21:43,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-11 18:21:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 18:21:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 18:21:43,378 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) [2021-03-11 18:21:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 18:21:43,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-03-11 18:21:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 18:21:43,379 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 18:21:43,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 18:21:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 18:21:43,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 18:21:43,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 18:21:43,381 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:21:43 BasicIcfg [2021-03-11 18:21:43,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 18:21:43,382 INFO L168 Benchmark]: Toolchain (without parser) took 2843.22 ms. Allocated memory was 255.9 MB in the beginning and 482.3 MB in the end (delta: 226.5 MB). Free memory was 236.6 MB in the beginning and 437.2 MB in the end (delta: -200.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2021-03-11 18:21:43,382 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 18:21:43,382 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 18:21:43,382 INFO L168 Benchmark]: Boogie Preprocessor took 10.49 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 919.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 18:21:43,383 INFO L168 Benchmark]: RCFGBuilder took 192.05 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 238.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-11 18:21:43,383 INFO L168 Benchmark]: TraceAbstraction took 2615.58 ms. Allocated memory was 255.9 MB in the beginning and 482.3 MB in the end (delta: 226.5 MB). Free memory was 237.4 MB in the beginning and 437.2 MB in the end (delta: -199.8 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.0 GB. [2021-03-11 18:21:43,383 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.49 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 919.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 192.05 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 238.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2615.58 ms. Allocated memory was 255.9 MB in the beginning and 482.3 MB in the end (delta: 226.5 MB). Free memory was 237.4 MB in the beginning and 437.2 MB in the end (delta: -199.8 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 358.6ms, 42 PlacesBefore, 30 PlacesAfterwards, 35 TransitionsBefore, 23 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 13 TotalNumberOfCompositions, 942 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 431, positive: 333, positive conditional: 0, positive unconditional: 333, negative: 98, negative conditional: 0, negative unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 184, positive: 152, positive conditional: 0, positive unconditional: 152, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 184, positive: 146, positive conditional: 0, positive unconditional: 146, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 38, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 116, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 100, negative conditional: 0, negative unconditional: 100, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 431, positive: 181, positive conditional: 0, positive unconditional: 181, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 184, unknown conditional: 0, unknown unconditional: 184] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 71, Positive conditional cache size: 0, Positive unconditional cache size: 71, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20 - PositiveResult [Line: 60]: 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, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2552.5ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 19.6ms, AutomataDifference: 1064.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 407.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 328 SDtfs, 867 SDslu, 821 SDs, 0 SdLazy, 533 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 275.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 903.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=0, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 75.4ms AutomataMinimizationTime, 14 MinimizatonAttempts, 420 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.2ms SsaConstructionTime, 103.3ms SatisfiabilityAnalysisTime, 724.9ms InterpolantComputationTime, 280 NumberOfCodeBlocks, 280 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 1102 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...