/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 17:19:00,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 17:19:00,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 17:19:00,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 17:19:00,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 17:19:00,909 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 17:19:00,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 17:19:00,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 17:19:00,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 17:19:00,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 17:19:00,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 17:19:00,912 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 17:19:00,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 17:19:00,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 17:19:00,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 17:19:00,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 17:19:00,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 17:19:00,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:19:00,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 17:19:00,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 17:19:00,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 17:19:01,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 17:19:01,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 17:19:01,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 17:19:01,187 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 17:19:01,188 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 17:19:01,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2021-05-03 17:19:01,189 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2021-05-03 17:19:01,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 17:19:01,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 17:19:01,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 17:19:01,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 17:19:01,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 17:19:01,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 17:19:01,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 17:19:01,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 17:19:01,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 17:19:01,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... [2021-05-03 17:19:01,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 17:19:01,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 17:19:01,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 17:19:01,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 17:19:01,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:19:01,399 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 17:19:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 17:19:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 17:19:01,399 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 17:19:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 17:19:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 17:19:01,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 17:19:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 17:19:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 17:19:01,400 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 17:19:01,584 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 17:19:01,585 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 17:19:01,585 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:19:01 BoogieIcfgContainer [2021-05-03 17:19:01,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 17:19:01,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 17:19:01,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 17:19:01,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 17:19:01,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:19:01" (1/2) ... [2021-05-03 17:19:01,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e14e87 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 05:19:01, skipping insertion in model container [2021-05-03 17:19:01,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:19:01" (2/2) ... [2021-05-03 17:19:01,590 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2021-05-03 17:19:01,594 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 17:19:01,594 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 17:19:01,596 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 17:19:01,597 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 17:19:01,620 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 17:19:01,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 17:19:01,657 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 17:19:01,658 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 17:19:01,658 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 17:19:01,658 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 17:19:01,658 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 17:19:01,658 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 17:19:01,658 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 17:19:01,658 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 17:19:01,675 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 35 transitions, 86 flow [2021-05-03 17:19:01,706 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 154 states, 152 states have (on average 1.7960526315789473) internal successors, (273), 153 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 152 states have (on average 1.7960526315789473) internal successors, (273), 153 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:01,714 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:01,715 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:01,715 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash -914189483, now seen corresponding path program 1 times [2021-05-03 17:19:01,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:01,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289916585] [2021-05-03 17:19:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:01,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289916585] [2021-05-03 17:19:02,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:02,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:19:02,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147462655] [2021-05-03 17:19:02,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:02,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:02,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:02,021 INFO L87 Difference]: Start difference. First operand has 154 states, 152 states have (on average 1.7960526315789473) internal successors, (273), 153 states have internal predecessors, (273), 0 states have call successors, (0), 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, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:02,184 INFO L93 Difference]: Finished difference Result 202 states and 341 transitions. [2021-05-03 17:19:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:19:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:02,209 INFO L225 Difference]: With dead ends: 202 [2021-05-03 17:19:02,210 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 17:19:02,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:19:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 17:19:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2021-05-03 17:19:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.7416666666666667) internal successors, (209), 120 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 209 transitions. [2021-05-03 17:19:02,286 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 209 transitions. Word has length 31 [2021-05-03 17:19:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:02,286 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 209 transitions. [2021-05-03 17:19:02,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 209 transitions. [2021-05-03 17:19:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:02,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:02,287 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:02,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 17:19:02,288 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1150170667, now seen corresponding path program 2 times [2021-05-03 17:19:02,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:02,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282928109] [2021-05-03 17:19:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:02,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282928109] [2021-05-03 17:19:02,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:02,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 17:19:02,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191726865] [2021-05-03 17:19:02,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:02,367 INFO L87 Difference]: Start difference. First operand 121 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:02,456 INFO L93 Difference]: Finished difference Result 228 states and 387 transitions. [2021-05-03 17:19:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:02,458 INFO L225 Difference]: With dead ends: 228 [2021-05-03 17:19:02,458 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 17:19:02,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:19:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 17:19:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 106. [2021-05-03 17:19:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.7047619047619047) internal successors, (179), 105 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 179 transitions. [2021-05-03 17:19:02,468 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 179 transitions. Word has length 31 [2021-05-03 17:19:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:02,469 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 179 transitions. [2021-05-03 17:19:02,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 179 transitions. [2021-05-03 17:19:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:02,470 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:02,470 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:02,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 17:19:02,470 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 628560125, now seen corresponding path program 3 times [2021-05-03 17:19:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689251209] [2021-05-03 17:19:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:02,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689251209] [2021-05-03 17:19:02,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:02,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 17:19:02,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862086680] [2021-05-03 17:19:02,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 17:19:02,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 17:19:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:19:02,485 INFO L87 Difference]: Start difference. First operand 106 states and 179 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:02,490 INFO L93 Difference]: Finished difference Result 100 states and 167 transitions. [2021-05-03 17:19:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 17:19:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:02,491 INFO L225 Difference]: With dead ends: 100 [2021-05-03 17:19:02,491 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 17:19:02,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:19:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 17:19:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-03 17:19:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.6868686868686869) internal successors, (167), 99 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 167 transitions. [2021-05-03 17:19:02,497 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 167 transitions. Word has length 31 [2021-05-03 17:19:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:02,497 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 167 transitions. [2021-05-03 17:19:02,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 167 transitions. [2021-05-03 17:19:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:02,498 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:02,498 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:02,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 17:19:02,499 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:02,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:02,499 INFO L82 PathProgramCache]: Analyzing trace with hash -88600699, now seen corresponding path program 4 times [2021-05-03 17:19:02,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:02,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449557982] [2021-05-03 17:19:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:02,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449557982] [2021-05-03 17:19:02,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:02,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:19:02,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117234756] [2021-05-03 17:19:02,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:02,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:02,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:02,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:02,576 INFO L87 Difference]: Start difference. First operand 100 states and 167 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:02,654 INFO L93 Difference]: Finished difference Result 131 states and 210 transitions. [2021-05-03 17:19:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:19:02,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:02,655 INFO L225 Difference]: With dead ends: 131 [2021-05-03 17:19:02,655 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 17:19:02,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:19:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 17:19:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-05-03 17:19:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.6025641025641026) internal successors, (125), 78 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2021-05-03 17:19:02,660 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 31 [2021-05-03 17:19:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:02,660 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 125 transitions. [2021-05-03 17:19:02,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 125 transitions. [2021-05-03 17:19:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:02,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:02,661 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:02,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 17:19:02,661 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 538045003, now seen corresponding path program 5 times [2021-05-03 17:19:02,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:02,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331731011] [2021-05-03 17:19:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:02,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331731011] [2021-05-03 17:19:02,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:02,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:02,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759574419] [2021-05-03 17:19:02,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:02,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:02,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:02,755 INFO L87 Difference]: Start difference. First operand 79 states and 125 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:02,892 INFO L93 Difference]: Finished difference Result 214 states and 334 transitions. [2021-05-03 17:19:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:19:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:02,893 INFO L225 Difference]: With dead ends: 214 [2021-05-03 17:19:02,894 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 17:19:02,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 17:19:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 90. [2021-05-03 17:19:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.595505617977528) internal successors, (142), 89 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 142 transitions. [2021-05-03 17:19:02,912 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 142 transitions. Word has length 31 [2021-05-03 17:19:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:02,913 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 142 transitions. [2021-05-03 17:19:02,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 142 transitions. [2021-05-03 17:19:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:02,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:02,916 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:02,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 17:19:02,917 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash 593498699, now seen corresponding path program 6 times [2021-05-03 17:19:02,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:02,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628793774] [2021-05-03 17:19:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628793774] [2021-05-03 17:19:03,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:03,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33282287] [2021-05-03 17:19:03,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:03,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:03,002 INFO L87 Difference]: Start difference. First operand 90 states and 142 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:03,123 INFO L93 Difference]: Finished difference Result 201 states and 310 transitions. [2021-05-03 17:19:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:19:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:03,126 INFO L225 Difference]: With dead ends: 201 [2021-05-03 17:19:03,126 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 17:19:03,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 17:19:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 80. [2021-05-03 17:19:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 126 transitions. [2021-05-03 17:19:03,130 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 126 transitions. Word has length 31 [2021-05-03 17:19:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:03,130 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 126 transitions. [2021-05-03 17:19:03,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 126 transitions. [2021-05-03 17:19:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:03,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:03,131 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:03,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 17:19:03,131 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1972958505, now seen corresponding path program 7 times [2021-05-03 17:19:03,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:03,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907349122] [2021-05-03 17:19:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907349122] [2021-05-03 17:19:03,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295552134] [2021-05-03 17:19:03,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:03,217 INFO L87 Difference]: Start difference. First operand 80 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:03,330 INFO L93 Difference]: Finished difference Result 200 states and 309 transitions. [2021-05-03 17:19:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:19:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:03,331 INFO L225 Difference]: With dead ends: 200 [2021-05-03 17:19:03,331 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 17:19:03,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 17:19:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 91. [2021-05-03 17:19:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.6) internal successors, (144), 90 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 144 transitions. [2021-05-03 17:19:03,346 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 144 transitions. Word has length 31 [2021-05-03 17:19:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:03,346 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 144 transitions. [2021-05-03 17:19:03,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 144 transitions. [2021-05-03 17:19:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:03,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:03,347 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:03,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 17:19:03,352 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2028412201, now seen corresponding path program 8 times [2021-05-03 17:19:03,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:03,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222910924] [2021-05-03 17:19:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222910924] [2021-05-03 17:19:03,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:03,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638613055] [2021-05-03 17:19:03,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:03,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:03,422 INFO L87 Difference]: Start difference. First operand 91 states and 144 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:03,511 INFO L93 Difference]: Finished difference Result 187 states and 285 transitions. [2021-05-03 17:19:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:19:03,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:03,512 INFO L225 Difference]: With dead ends: 187 [2021-05-03 17:19:03,513 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 17:19:03,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 17:19:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 83. [2021-05-03 17:19:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.5731707317073171) internal successors, (129), 82 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 129 transitions. [2021-05-03 17:19:03,515 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 129 transitions. Word has length 31 [2021-05-03 17:19:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:03,515 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 129 transitions. [2021-05-03 17:19:03,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 129 transitions. [2021-05-03 17:19:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:03,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:03,516 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:03,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 17:19:03,516 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash 440382761, now seen corresponding path program 9 times [2021-05-03 17:19:03,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:03,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385188022] [2021-05-03 17:19:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385188022] [2021-05-03 17:19:03,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 17:19:03,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88651206] [2021-05-03 17:19:03,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 17:19:03,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 17:19:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:19:03,527 INFO L87 Difference]: Start difference. First operand 83 states and 129 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:03,529 INFO L93 Difference]: Finished difference Result 82 states and 124 transitions. [2021-05-03 17:19:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 17:19:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:03,530 INFO L225 Difference]: With dead ends: 82 [2021-05-03 17:19:03,530 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 17:19:03,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 17:19:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 17:19:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-03 17:19:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 75 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2021-05-03 17:19:03,532 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 31 [2021-05-03 17:19:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:03,532 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2021-05-03 17:19:03,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2021-05-03 17:19:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:03,533 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:03,533 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:03,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 17:19:03,533 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 205229245, now seen corresponding path program 10 times [2021-05-03 17:19:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:03,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849362731] [2021-05-03 17:19:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849362731] [2021-05-03 17:19:03,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184479619] [2021-05-03 17:19:03,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:03,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:03,618 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:03,699 INFO L93 Difference]: Finished difference Result 98 states and 150 transitions. [2021-05-03 17:19:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:03,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:03,703 INFO L225 Difference]: With dead ends: 98 [2021-05-03 17:19:03,704 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 17:19:03,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 17:19:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2021-05-03 17:19:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.5365853658536586) internal successors, (126), 82 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2021-05-03 17:19:03,711 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 31 [2021-05-03 17:19:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:03,711 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2021-05-03 17:19:03,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2021-05-03 17:19:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:03,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:03,712 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:03,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 17:19:03,712 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash 260682941, now seen corresponding path program 11 times [2021-05-03 17:19:03,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:03,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071893413] [2021-05-03 17:19:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071893413] [2021-05-03 17:19:03,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:03,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296241579] [2021-05-03 17:19:03,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:03,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:03,789 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:03,872 INFO L93 Difference]: Finished difference Result 87 states and 130 transitions. [2021-05-03 17:19:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:03,873 INFO L225 Difference]: With dead ends: 87 [2021-05-03 17:19:03,873 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 17:19:03,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 17:19:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-03 17:19:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 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) [2021-05-03 17:19:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 112 transitions. [2021-05-03 17:19:03,875 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 112 transitions. Word has length 31 [2021-05-03 17:19:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:03,875 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 112 transitions. [2021-05-03 17:19:03,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 112 transitions. [2021-05-03 17:19:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:03,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:03,876 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:03,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 17:19:03,876 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1640142747, now seen corresponding path program 12 times [2021-05-03 17:19:03,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:03,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89571875] [2021-05-03 17:19:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:03,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89571875] [2021-05-03 17:19:03,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:03,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597708905] [2021-05-03 17:19:03,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:03,924 INFO L87 Difference]: Start difference. First operand 74 states and 112 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:04,006 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2021-05-03 17:19:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:04,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:04,008 INFO L225 Difference]: With dead ends: 104 [2021-05-03 17:19:04,008 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 17:19:04,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 17:19:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2021-05-03 17:19:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.524390243902439) internal successors, (125), 82 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-05-03 17:19:04,012 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 31 [2021-05-03 17:19:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:04,012 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-05-03 17:19:04,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-05-03 17:19:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:04,012 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:04,013 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:04,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 17:19:04,013 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1695596443, now seen corresponding path program 13 times [2021-05-03 17:19:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:04,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030502683] [2021-05-03 17:19:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:04,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030502683] [2021-05-03 17:19:04,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:04,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 17:19:04,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565072070] [2021-05-03 17:19:04,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:19:04,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:04,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:19:04,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:19:04,095 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:04,188 INFO L93 Difference]: Finished difference Result 87 states and 129 transitions. [2021-05-03 17:19:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:19:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:04,189 INFO L225 Difference]: With dead ends: 87 [2021-05-03 17:19:04,189 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 17:19:04,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:19:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 17:19:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-03 17:19:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 72 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 110 transitions. [2021-05-03 17:19:04,191 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 110 transitions. Word has length 31 [2021-05-03 17:19:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:04,191 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 110 transitions. [2021-05-03 17:19:04,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 110 transitions. [2021-05-03 17:19:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 17:19:04,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:19:04,192 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:19:04,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 17:19:04,192 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:19:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:19:04,192 INFO L82 PathProgramCache]: Analyzing trace with hash -127865327, now seen corresponding path program 14 times [2021-05-03 17:19:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:19:04,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613698997] [2021-05-03 17:19:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:19:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:19:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:19:04,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613698997] [2021-05-03 17:19:04,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:19:04,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 17:19:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751642284] [2021-05-03 17:19:04,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 17:19:04,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:19:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 17:19:04,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:19:04,238 INFO L87 Difference]: Start difference. First operand 73 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:19:04,271 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-05-03 17:19:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:19:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 17:19:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:19:04,272 INFO L225 Difference]: With dead ends: 43 [2021-05-03 17:19:04,272 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 17:19:04,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:19:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 17:19:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 17:19:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 17:19:04,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-03 17:19:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:19:04,273 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 17:19:04,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:19:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 17:19:04,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 17:19:04,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 17:19:04,276 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 05:19:04 BasicIcfg [2021-05-03 17:19:04,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 17:19:04,277 INFO L168 Benchmark]: Toolchain (without parser) took 3012.75 ms. Allocated memory is still 348.1 MB. Free memory was 327.7 MB in the beginning and 184.6 MB in the end (delta: 143.0 MB). Peak memory consumption was 144.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:19:04,277 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 348.1 MB. Free memory is still 328.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:19:04,277 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.07 ms. Allocated memory is still 348.1 MB. Free memory was 327.7 MB in the beginning and 326.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:19:04,278 INFO L168 Benchmark]: Boogie Preprocessor took 11.78 ms. Allocated memory is still 348.1 MB. Free memory was 326.2 MB in the beginning and 325.3 MB in the end (delta: 846.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:19:04,278 INFO L168 Benchmark]: RCFGBuilder took 246.08 ms. Allocated memory is still 348.1 MB. Free memory was 325.3 MB in the beginning and 313.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-03 17:19:04,278 INFO L168 Benchmark]: TraceAbstraction took 2689.99 ms. Allocated memory is still 348.1 MB. Free memory was 313.3 MB in the beginning and 184.6 MB in the end (delta: 128.6 MB). Peak memory consumption was 129.4 MB. Max. memory is 16.0 GB. [2021-05-03 17:19:04,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 348.1 MB. Free memory is still 328.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 32.07 ms. Allocated memory is still 348.1 MB. Free memory was 327.7 MB in the beginning and 326.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.78 ms. Allocated memory is still 348.1 MB. Free memory was 326.2 MB in the beginning and 325.3 MB in the end (delta: 846.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 246.08 ms. Allocated memory is still 348.1 MB. Free memory was 325.3 MB in the beginning and 313.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2689.99 ms. Allocated memory is still 348.1 MB. Free memory was 313.3 MB in the beginning and 184.6 MB in the end (delta: 128.6 MB). Peak memory consumption was 129.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 2617.7ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 17.0ms, AutomataDifference: 1247.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 48.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 540 SDtfs, 1443 SDslu, 1489 SDs, 0 SdLazy, 544 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 354.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1058.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=0, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 127.1ms AutomataMinimizationTime, 14 MinimizatonAttempts, 583 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.1ms SsaConstructionTime, 98.8ms SatisfiabilityAnalysisTime, 907.0ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 420 ConstructedInterpolants, 0 QuantifiedInterpolants, 1626 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...