/usr/bin/java -Xmx8000000000 -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/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 20:10:16,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 20:10:16,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 20:10:16,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 20:10:16,923 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 [2021-08-12 20:10:16,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 20:10:16,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 20:10:16,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 20:10:16,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 20:10:16,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 20:10:16,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 20:10:16,952 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 20:10:16,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 20:10:16,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 20:10:16,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 20:10:16,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 20:10:16,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 20:10:16,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 20:10:16,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 20:10:16,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 20:10:16,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 20:10:16,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 20:10:16,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 20:10:16,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 20:10:16,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 20:10:16,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 20:10:16,956 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 20:10:16,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 20:10:16,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 20:10:17,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 20:10:17,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 20:10:17,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 20:10:17,217 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 20:10:17,218 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 20:10:17,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-08-12 20:10:17,219 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-08-12 20:10:17,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 20:10:17,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 20:10:17,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 20:10:17,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 20:10:17,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 20:10:17,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 20:10:17,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 20:10:17,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 20:10:17,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 20:10:17,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/1) ... [2021-08-12 20:10:17,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 20:10:17,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 20:10:17,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 20:10:17,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 20:10:17,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (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 [2021-08-12 20:10:17,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 20:10:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 20:10:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 20:10:17,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 20:10:17,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 20:10:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 20:10:17,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 20:10:17,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 20:10:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 20:10:17,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 20:10:17,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 20:10:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 20:10:17,326 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 20:10:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 20:10:17,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 20:10:17,326 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 20:10:17,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 20:10:17,541 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 20:10:17,543 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 08:10:17 BoogieIcfgContainer [2021-08-12 20:10:17,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 20:10:17,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 20:10:17,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 20:10:17,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 20:10:17,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:10:17" (1/2) ... [2021-08-12 20:10:17,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ada398f and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 08:10:17, skipping insertion in model container [2021-08-12 20:10:17,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 08:10:17" (2/2) ... [2021-08-12 20:10:17,550 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-08-12 20:10:17,566 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 20:10:17,566 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 20:10:17,567 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 20:10:17,634 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-12 20:10:17,649 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-12 20:10:17,664 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 20:10:17,664 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 20:10:17,664 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 20:10:17,664 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 20:10:17,665 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 20:10:17,665 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 20:10:17,665 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 20:10:17,665 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 20:10:17,672 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-08-12 20:10:17,707 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 20:10:17,727 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:17,728 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:17,728 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash -39669396, now seen corresponding path program 1 times [2021-08-12 20:10:17,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:17,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206377968] [2021-08-12 20:10:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:17,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206377968] [2021-08-12 20:10:17,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206377968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:10:17,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:10:17,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 20:10:17,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469343326] [2021-08-12 20:10:17,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 20:10:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 20:10:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 20:10:17,873 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:17,965 INFO L93 Difference]: Finished difference Result 858 states and 3307 transitions. [2021-08-12 20:10:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 20:10:17,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-08-12 20:10:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:17,985 INFO L225 Difference]: With dead ends: 858 [2021-08-12 20:10:17,985 INFO L226 Difference]: Without dead ends: 823 [2021-08-12 20:10:17,987 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 20:10:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-08-12 20:10:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-08-12 20:10:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-08-12 20:10:18,083 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-08-12 20:10:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:18,084 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-08-12 20:10:18,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-08-12 20:10:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 20:10:18,088 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:18,088 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:18,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 20:10:18,089 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1569931572, now seen corresponding path program 1 times [2021-08-12 20:10:18,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:18,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513104250] [2021-08-12 20:10:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:18,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:18,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513104250] [2021-08-12 20:10:18,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513104250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:18,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77472129] [2021-08-12 20:10:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 20:10:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:18,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77472129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:18,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:18,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-12 20:10:18,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660322843] [2021-08-12 20:10:18,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:18,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:18,274 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:18,426 INFO L93 Difference]: Finished difference Result 1956 states and 7550 transitions. [2021-08-12 20:10:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 20:10:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 20:10:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:18,436 INFO L225 Difference]: With dead ends: 1956 [2021-08-12 20:10:18,437 INFO L226 Difference]: Without dead ends: 1573 [2021-08-12 20:10:18,439 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 20:10:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-08-12 20:10:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-08-12 20:10:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-08-12 20:10:18,513 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-08-12 20:10:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:18,513 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-08-12 20:10:18,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-08-12 20:10:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 20:10:18,517 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:18,517 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:18,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 20:10:18,733 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1597271150, now seen corresponding path program 1 times [2021-08-12 20:10:18,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:18,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553509994] [2021-08-12 20:10:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:18,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:18,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553509994] [2021-08-12 20:10:18,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553509994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:18,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817201687] [2021-08-12 20:10:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 20:10:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:18,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817201687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:18,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:18,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-12 20:10:18,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745918829] [2021-08-12 20:10:18,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:18,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:18,850 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:18,953 INFO L93 Difference]: Finished difference Result 2263 states and 8583 transitions. [2021-08-12 20:10:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 20:10:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:18,964 INFO L225 Difference]: With dead ends: 2263 [2021-08-12 20:10:18,964 INFO L226 Difference]: Without dead ends: 1748 [2021-08-12 20:10:18,965 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 20:10:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-08-12 20:10:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-08-12 20:10:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-08-12 20:10:19,017 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-08-12 20:10:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:19,018 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-08-12 20:10:19,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-08-12 20:10:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 20:10:19,020 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:19,020 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:19,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:19,221 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:19,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1296417938, now seen corresponding path program 1 times [2021-08-12 20:10:19,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:19,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394963669] [2021-08-12 20:10:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:19,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:19,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394963669] [2021-08-12 20:10:19,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394963669] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:10:19,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:10:19,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:10:19,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922219934] [2021-08-12 20:10:19,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 20:10:19,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 20:10:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:19,255 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:19,369 INFO L93 Difference]: Finished difference Result 1559 states and 5910 transitions. [2021-08-12 20:10:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 20:10:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 20:10:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:19,376 INFO L225 Difference]: With dead ends: 1559 [2021-08-12 20:10:19,376 INFO L226 Difference]: Without dead ends: 884 [2021-08-12 20:10:19,377 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-08-12 20:10:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-08-12 20:10:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-08-12 20:10:19,409 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-08-12 20:10:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:19,409 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-08-12 20:10:19,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-08-12 20:10:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 20:10:19,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:19,412 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:19,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 20:10:19,412 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:19,413 INFO L82 PathProgramCache]: Analyzing trace with hash -845683858, now seen corresponding path program 2 times [2021-08-12 20:10:19,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:19,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962783597] [2021-08-12 20:10:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:19,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:19,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962783597] [2021-08-12 20:10:19,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962783597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:10:19,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:10:19,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:10:19,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780228775] [2021-08-12 20:10:19,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 20:10:19,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 20:10:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:19,458 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:19,540 INFO L93 Difference]: Finished difference Result 1239 states and 4563 transitions. [2021-08-12 20:10:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 20:10:19,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 20:10:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:19,547 INFO L225 Difference]: With dead ends: 1239 [2021-08-12 20:10:19,547 INFO L226 Difference]: Without dead ends: 949 [2021-08-12 20:10:19,547 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-08-12 20:10:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-08-12 20:10:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-08-12 20:10:19,570 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-08-12 20:10:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:19,571 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-08-12 20:10:19,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-08-12 20:10:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:19,573 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:19,573 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:19,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 20:10:19,573 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash -105864754, now seen corresponding path program 1 times [2021-08-12 20:10:19,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:19,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332173756] [2021-08-12 20:10:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:19,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:19,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332173756] [2021-08-12 20:10:19,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332173756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:19,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693544509] [2021-08-12 20:10:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:10:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:19,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:10:19,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:19,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693544509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:19,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:19,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-12 20:10:19,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422595353] [2021-08-12 20:10:19,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 20:10:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:19,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 20:10:19,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 20:10:19,712 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:19,851 INFO L93 Difference]: Finished difference Result 1630 states and 6106 transitions. [2021-08-12 20:10:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 20:10:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:19,859 INFO L225 Difference]: With dead ends: 1630 [2021-08-12 20:10:19,859 INFO L226 Difference]: Without dead ends: 1389 [2021-08-12 20:10:19,860 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:10:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-08-12 20:10:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-08-12 20:10:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-08-12 20:10:19,893 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-08-12 20:10:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:19,894 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-08-12 20:10:19,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-08-12 20:10:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:19,897 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:19,897 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:20,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:20,109 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash 993256014, now seen corresponding path program 1 times [2021-08-12 20:10:20,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:20,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030591248] [2021-08-12 20:10:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:20,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030591248] [2021-08-12 20:10:20,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030591248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776967840] [2021-08-12 20:10:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:20,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:20,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776967840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:20,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:20,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:20,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662986821] [2021-08-12 20:10:20,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:20,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:20,246 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:20,362 INFO L93 Difference]: Finished difference Result 1783 states and 6591 transitions. [2021-08-12 20:10:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:20,372 INFO L225 Difference]: With dead ends: 1783 [2021-08-12 20:10:20,372 INFO L226 Difference]: Without dead ends: 1738 [2021-08-12 20:10:20,373 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-08-12 20:10:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-08-12 20:10:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-08-12 20:10:20,408 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-08-12 20:10:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:20,409 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-08-12 20:10:20,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-08-12 20:10:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:20,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:20,411 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:20,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:20,622 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-08-12 20:10:20,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:20,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513154617] [2021-08-12 20:10:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:20,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:20,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513154617] [2021-08-12 20:10:20,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513154617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:20,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704902751] [2021-08-12 20:10:20,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:20,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:10:20,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704902751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:20,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:20,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073383897] [2021-08-12 20:10:20,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:20,751 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:20,862 INFO L93 Difference]: Finished difference Result 1506 states and 5659 transitions. [2021-08-12 20:10:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:20,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:20,872 INFO L225 Difference]: With dead ends: 1506 [2021-08-12 20:10:20,872 INFO L226 Difference]: Without dead ends: 1461 [2021-08-12 20:10:20,872 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-08-12 20:10:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-08-12 20:10:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-08-12 20:10:20,910 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-08-12 20:10:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:20,910 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-08-12 20:10:20,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-08-12 20:10:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:20,912 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:20,913 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:21,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:21,133 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-08-12 20:10:21,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:21,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589998187] [2021-08-12 20:10:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:21,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589998187] [2021-08-12 20:10:21,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589998187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:21,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598097808] [2021-08-12 20:10:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:21,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:10:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:21,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598097808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:21,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:21,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014663890] [2021-08-12 20:10:21,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:21,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:21,284 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:21,388 INFO L93 Difference]: Finished difference Result 1446 states and 5471 transitions. [2021-08-12 20:10:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:21,398 INFO L225 Difference]: With dead ends: 1446 [2021-08-12 20:10:21,398 INFO L226 Difference]: Without dead ends: 1401 [2021-08-12 20:10:21,399 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-08-12 20:10:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-08-12 20:10:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-08-12 20:10:21,437 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-08-12 20:10:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:21,437 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-08-12 20:10:21,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-08-12 20:10:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:21,441 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:21,441 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:21,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:21,653 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:21,653 INFO L82 PathProgramCache]: Analyzing trace with hash -154583568, now seen corresponding path program 1 times [2021-08-12 20:10:21,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109545736] [2021-08-12 20:10:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:21,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:21,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109545736] [2021-08-12 20:10:21,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109545736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055712492] [2021-08-12 20:10:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:10:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:21,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:21,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:21,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055712492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:21,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:21,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:21,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783056512] [2021-08-12 20:10:21,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:21,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:21,781 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:21,927 INFO L93 Difference]: Finished difference Result 2519 states and 9615 transitions. [2021-08-12 20:10:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:21,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:21,939 INFO L225 Difference]: With dead ends: 2519 [2021-08-12 20:10:21,940 INFO L226 Difference]: Without dead ends: 2474 [2021-08-12 20:10:21,940 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-08-12 20:10:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-08-12 20:10:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-08-12 20:10:21,987 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-08-12 20:10:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:21,987 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-08-12 20:10:21,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-08-12 20:10:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:21,990 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:21,990 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:22,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 20:10:22,205 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1613744344, now seen corresponding path program 2 times [2021-08-12 20:10:22,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:22,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805505404] [2021-08-12 20:10:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:22,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:22,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805505404] [2021-08-12 20:10:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805505404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536131486] [2021-08-12 20:10:22,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:10:22,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:10:22,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:22,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536131486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:22,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:22,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:22,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318585613] [2021-08-12 20:10:22,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:22,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:22,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:22,334 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:22,460 INFO L93 Difference]: Finished difference Result 2130 states and 8199 transitions. [2021-08-12 20:10:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:22,470 INFO L225 Difference]: With dead ends: 2130 [2021-08-12 20:10:22,470 INFO L226 Difference]: Without dead ends: 2085 [2021-08-12 20:10:22,471 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-08-12 20:10:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-08-12 20:10:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-08-12 20:10:22,519 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-08-12 20:10:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:22,519 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-08-12 20:10:22,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-08-12 20:10:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:22,523 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:22,523 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:22,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 20:10:22,741 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:22,741 INFO L82 PathProgramCache]: Analyzing trace with hash 909626392, now seen corresponding path program 3 times [2021-08-12 20:10:22,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:22,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772017503] [2021-08-12 20:10:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:22,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772017503] [2021-08-12 20:10:22,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772017503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041705525] [2021-08-12 20:10:22,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:22,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:10:22,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041705525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:22,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:22,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:22,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025580461] [2021-08-12 20:10:22,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:22,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:22,865 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:23,046 INFO L93 Difference]: Finished difference Result 2249 states and 8751 transitions. [2021-08-12 20:10:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:23,057 INFO L225 Difference]: With dead ends: 2249 [2021-08-12 20:10:23,057 INFO L226 Difference]: Without dead ends: 2204 [2021-08-12 20:10:23,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-08-12 20:10:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-08-12 20:10:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-08-12 20:10:23,120 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-08-12 20:10:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:23,121 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-08-12 20:10:23,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-08-12 20:10:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:23,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:23,124 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:23,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:23,337 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:23,337 INFO L82 PathProgramCache]: Analyzing trace with hash -461480336, now seen corresponding path program 1 times [2021-08-12 20:10:23,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:23,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528073985] [2021-08-12 20:10:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:23,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528073985] [2021-08-12 20:10:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528073985] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:10:23,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:10:23,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 20:10:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366334858] [2021-08-12 20:10:23,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 20:10:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:23,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 20:10:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 20:10:23,354 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:23,444 INFO L93 Difference]: Finished difference Result 1887 states and 7251 transitions. [2021-08-12 20:10:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 20:10:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:23,450 INFO L225 Difference]: With dead ends: 1887 [2021-08-12 20:10:23,450 INFO L226 Difference]: Without dead ends: 1413 [2021-08-12 20:10:23,450 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 20:10:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-08-12 20:10:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-08-12 20:10:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-08-12 20:10:23,493 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-08-12 20:10:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:23,493 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-08-12 20:10:23,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-08-12 20:10:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:23,496 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:23,496 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:23,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-12 20:10:23,496 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1970176528, now seen corresponding path program 4 times [2021-08-12 20:10:23,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:23,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245289531] [2021-08-12 20:10:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:23,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:23,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245289531] [2021-08-12 20:10:23,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245289531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:23,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962909491] [2021-08-12 20:10:23,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:23,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:23,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:23,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:23,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962909491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:23,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:23,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:23,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467107650] [2021-08-12 20:10:23,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:23,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:23,602 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:23,827 INFO L93 Difference]: Finished difference Result 2932 states and 11378 transitions. [2021-08-12 20:10:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:23,838 INFO L225 Difference]: With dead ends: 2932 [2021-08-12 20:10:23,838 INFO L226 Difference]: Without dead ends: 2887 [2021-08-12 20:10:23,839 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-08-12 20:10:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-08-12 20:10:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-08-12 20:10:23,904 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-08-12 20:10:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:23,904 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-08-12 20:10:23,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-08-12 20:10:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:23,908 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:23,908 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:24,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:24,125 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -210123588, now seen corresponding path program 5 times [2021-08-12 20:10:24,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:24,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103235141] [2021-08-12 20:10:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:24,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103235141] [2021-08-12 20:10:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103235141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133584911] [2021-08-12 20:10:24,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:24,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:10:24,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133584911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:24,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:24,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501638773] [2021-08-12 20:10:24,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:24,269 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:24,472 INFO L93 Difference]: Finished difference Result 2436 states and 9628 transitions. [2021-08-12 20:10:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:24,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:24,481 INFO L225 Difference]: With dead ends: 2436 [2021-08-12 20:10:24,481 INFO L226 Difference]: Without dead ends: 2391 [2021-08-12 20:10:24,481 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-12 20:10:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-08-12 20:10:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-08-12 20:10:24,536 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-08-12 20:10:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:24,536 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-08-12 20:10:24,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-08-12 20:10:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:24,540 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:24,540 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:24,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 20:10:24,757 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1981720148, now seen corresponding path program 6 times [2021-08-12 20:10:24,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:24,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015748480] [2021-08-12 20:10:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:24,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015748480] [2021-08-12 20:10:24,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015748480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884928707] [2021-08-12 20:10:24,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:10:24,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 20:10:24,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:24,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:24,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:24,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884928707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:24,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:24,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 20:10:24,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260502467] [2021-08-12 20:10:24,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:10:24,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:24,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:10:24,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:24,884 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:25,126 INFO L93 Difference]: Finished difference Result 2602 states and 10382 transitions. [2021-08-12 20:10:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 20:10:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:25,136 INFO L225 Difference]: With dead ends: 2602 [2021-08-12 20:10:25,136 INFO L226 Difference]: Without dead ends: 2557 [2021-08-12 20:10:25,137 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 20:10:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-08-12 20:10:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-08-12 20:10:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-08-12 20:10:25,202 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-08-12 20:10:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:25,203 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-08-12 20:10:25,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-08-12 20:10:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:25,206 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:25,206 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:25,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 20:10:25,422 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:25,422 INFO L82 PathProgramCache]: Analyzing trace with hash 157052528, now seen corresponding path program 2 times [2021-08-12 20:10:25,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:25,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022629587] [2021-08-12 20:10:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:25,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:25,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022629587] [2021-08-12 20:10:25,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022629587] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:10:25,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:10:25,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:10:25,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725594408] [2021-08-12 20:10:25,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 20:10:25,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:25,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 20:10:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:25,446 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:25,587 INFO L93 Difference]: Finished difference Result 2352 states and 9600 transitions. [2021-08-12 20:10:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 20:10:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:25,595 INFO L225 Difference]: With dead ends: 2352 [2021-08-12 20:10:25,595 INFO L226 Difference]: Without dead ends: 1866 [2021-08-12 20:10:25,596 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-08-12 20:10:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-08-12 20:10:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-08-12 20:10:25,652 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-08-12 20:10:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:25,652 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-08-12 20:10:25,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-08-12 20:10:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:25,656 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:25,656 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:25,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-12 20:10:25,656 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-08-12 20:10:25,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:25,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169624294] [2021-08-12 20:10:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:25,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:25,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169624294] [2021-08-12 20:10:25,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169624294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:25,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350190478] [2021-08-12 20:10:25,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:25,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:10:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:10:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350190478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:25,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:25,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-12 20:10:25,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061581842] [2021-08-12 20:10:25,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:10:25,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:10:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:25,769 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) 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) [2021-08-12 20:10:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:26,122 INFO L93 Difference]: Finished difference Result 3801 states and 14657 transitions. [2021-08-12 20:10:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 20:10:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) 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 23 [2021-08-12 20:10:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:26,134 INFO L225 Difference]: With dead ends: 3801 [2021-08-12 20:10:26,134 INFO L226 Difference]: Without dead ends: 3584 [2021-08-12 20:10:26,135 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:10:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-08-12 20:10:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-08-12 20:10:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-08-12 20:10:26,243 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-08-12 20:10:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:26,244 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-08-12 20:10:26,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) 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) [2021-08-12 20:10:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-08-12 20:10:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:26,248 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:26,248 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:26,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 20:10:26,464 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-08-12 20:10:26,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:26,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083162238] [2021-08-12 20:10:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:26,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083162238] [2021-08-12 20:10:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083162238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758780145] [2021-08-12 20:10:26,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:10:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:10:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:26,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758780145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:26,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:26,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-12 20:10:26,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601818295] [2021-08-12 20:10:26,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:10:26,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:26,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:10:26,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:26,575 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) 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) [2021-08-12 20:10:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:27,065 INFO L93 Difference]: Finished difference Result 4647 states and 18368 transitions. [2021-08-12 20:10:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:10:27,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) 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 23 [2021-08-12 20:10:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:27,078 INFO L225 Difference]: With dead ends: 4647 [2021-08-12 20:10:27,078 INFO L226 Difference]: Without dead ends: 4126 [2021-08-12 20:10:27,080 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:10:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-08-12 20:10:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-08-12 20:10:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-08-12 20:10:27,180 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-08-12 20:10:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:27,181 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-08-12 20:10:27,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) 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) [2021-08-12 20:10:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-08-12 20:10:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:27,185 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:27,185 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:27,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:27,401 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-08-12 20:10:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972305608] [2021-08-12 20:10:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:27,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972305608] [2021-08-12 20:10:27,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972305608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:27,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554586268] [2021-08-12 20:10:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:27,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:27,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554586268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:27,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:27,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:27,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178597533] [2021-08-12 20:10:27,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:27,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:27,520 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:27,751 INFO L93 Difference]: Finished difference Result 2709 states and 11339 transitions. [2021-08-12 20:10:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:27,760 INFO L225 Difference]: With dead ends: 2709 [2021-08-12 20:10:27,760 INFO L226 Difference]: Without dead ends: 2643 [2021-08-12 20:10:27,761 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-08-12 20:10:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-08-12 20:10:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-08-12 20:10:27,873 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-08-12 20:10:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:27,873 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-08-12 20:10:27,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-08-12 20:10:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:27,878 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:27,878 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:28,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:28,093 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-08-12 20:10:28,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:28,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761506368] [2021-08-12 20:10:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:28,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:28,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761506368] [2021-08-12 20:10:28,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761506368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:28,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939173985] [2021-08-12 20:10:28,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:28,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:10:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:28,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939173985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:28,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:28,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:28,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523026966] [2021-08-12 20:10:28,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:28,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:28,190 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:28,462 INFO L93 Difference]: Finished difference Result 2724 states and 11387 transitions. [2021-08-12 20:10:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:28,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:28,470 INFO L225 Difference]: With dead ends: 2724 [2021-08-12 20:10:28,471 INFO L226 Difference]: Without dead ends: 2658 [2021-08-12 20:10:28,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-08-12 20:10:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-08-12 20:10:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-08-12 20:10:28,589 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-08-12 20:10:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:28,589 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-08-12 20:10:28,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-08-12 20:10:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:28,594 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:28,594 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:28,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:28,811 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-08-12 20:10:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:28,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659764204] [2021-08-12 20:10:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:28,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:28,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659764204] [2021-08-12 20:10:28,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659764204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:28,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504054970] [2021-08-12 20:10:28,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:28,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:10:28,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:10:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:28,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504054970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:28,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:28,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 20:10:28,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736695212] [2021-08-12 20:10:28,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 20:10:28,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 20:10:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:28,921 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:29,234 INFO L93 Difference]: Finished difference Result 3088 states and 12756 transitions. [2021-08-12 20:10:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 20:10:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:29,242 INFO L225 Difference]: With dead ends: 3088 [2021-08-12 20:10:29,242 INFO L226 Difference]: Without dead ends: 3022 [2021-08-12 20:10:29,242 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 20:10:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-08-12 20:10:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-08-12 20:10:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-08-12 20:10:29,335 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-08-12 20:10:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:29,335 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-08-12 20:10:29,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-08-12 20:10:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:29,340 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:29,340 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:29,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 20:10:29,553 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-08-12 20:10:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:29,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301963100] [2021-08-12 20:10:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:10:29,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301963100] [2021-08-12 20:10:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301963100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:10:29,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:10:29,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:10:29,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608255694] [2021-08-12 20:10:29,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 20:10:29,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 20:10:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:29,570 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:29,783 INFO L93 Difference]: Finished difference Result 2894 states and 12096 transitions. [2021-08-12 20:10:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 20:10:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:29,791 INFO L225 Difference]: With dead ends: 2894 [2021-08-12 20:10:29,791 INFO L226 Difference]: Without dead ends: 2525 [2021-08-12 20:10:29,793 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:10:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-08-12 20:10:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-08-12 20:10:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-08-12 20:10:29,907 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-08-12 20:10:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:29,907 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-08-12 20:10:29,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-08-12 20:10:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:29,911 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:29,911 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:29,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-12 20:10:29,911 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-08-12 20:10:29,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:29,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230575595] [2021-08-12 20:10:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:29,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:29,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230575595] [2021-08-12 20:10:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230575595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:29,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189518974] [2021-08-12 20:10:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:29,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:29,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:10:29,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189518974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:30,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-12 20:10:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473846426] [2021-08-12 20:10:30,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 20:10:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 20:10:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 20:10:30,003 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:30,385 INFO L93 Difference]: Finished difference Result 4128 states and 17121 transitions. [2021-08-12 20:10:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 20:10:30,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:30,397 INFO L225 Difference]: With dead ends: 4128 [2021-08-12 20:10:30,398 INFO L226 Difference]: Without dead ends: 3537 [2021-08-12 20:10:30,399 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:10:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-08-12 20:10:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-08-12 20:10:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-08-12 20:10:30,545 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-08-12 20:10:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:30,545 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-08-12 20:10:30,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-08-12 20:10:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:30,551 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:30,551 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:30,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 20:10:30,766 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:30,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-08-12 20:10:30,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:30,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744171616] [2021-08-12 20:10:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:30,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:30,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744171616] [2021-08-12 20:10:30,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744171616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:30,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392513442] [2021-08-12 20:10:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:30,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:10:30,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:10:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:30,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392513442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:30,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:30,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-12 20:10:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789387066] [2021-08-12 20:10:30,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:10:30,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:10:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:30,882 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:31,503 INFO L93 Difference]: Finished difference Result 5743 states and 23178 transitions. [2021-08-12 20:10:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 20:10:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:31,518 INFO L225 Difference]: With dead ends: 5743 [2021-08-12 20:10:31,519 INFO L226 Difference]: Without dead ends: 5435 [2021-08-12 20:10:31,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:10:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-08-12 20:10:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-08-12 20:10:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-08-12 20:10:31,708 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-08-12 20:10:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:31,708 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-08-12 20:10:31,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-08-12 20:10:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 20:10:31,716 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:31,716 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:31,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 20:10:31,929 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-08-12 20:10:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:31,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771069362] [2021-08-12 20:10:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:31,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:31,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771069362] [2021-08-12 20:10:31,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771069362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:31,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449347919] [2021-08-12 20:10:31,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:31,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 20:10:31,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:10:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:32,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449347919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:32,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:32,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-12 20:10:32,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733945497] [2021-08-12 20:10:32,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:10:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:10:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:32,030 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:32,798 INFO L93 Difference]: Finished difference Result 7284 states and 29970 transitions. [2021-08-12 20:10:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:10:32,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 20:10:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:32,817 INFO L225 Difference]: With dead ends: 7284 [2021-08-12 20:10:32,817 INFO L226 Difference]: Without dead ends: 6635 [2021-08-12 20:10:32,819 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:10:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-08-12 20:10:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-08-12 20:10:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-08-12 20:10:33,036 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-08-12 20:10:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:33,036 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-08-12 20:10:33,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-08-12 20:10:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:33,043 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:33,044 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:33,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 20:10:33,244 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1097839692, now seen corresponding path program 7 times [2021-08-12 20:10:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:33,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81250730] [2021-08-12 20:10:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:33,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:33,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81250730] [2021-08-12 20:10:33,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81250730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:33,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433718168] [2021-08-12 20:10:33,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:10:33,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:33,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433718168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:33,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:33,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-12 20:10:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247510017] [2021-08-12 20:10:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:10:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:10:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:10:33,362 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:34,347 INFO L93 Difference]: Finished difference Result 9107 states and 38594 transitions. [2021-08-12 20:10:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:10:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 25 [2021-08-12 20:10:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:34,369 INFO L225 Difference]: With dead ends: 9107 [2021-08-12 20:10:34,369 INFO L226 Difference]: Without dead ends: 7806 [2021-08-12 20:10:34,372 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:10:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-08-12 20:10:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-08-12 20:10:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-08-12 20:10:34,666 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-08-12 20:10:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:34,666 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-08-12 20:10:34,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-08-12 20:10:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:34,677 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:34,677 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 20:10:34,877 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1886925744, now seen corresponding path program 4 times [2021-08-12 20:10:34,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:34,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692652812] [2021-08-12 20:10:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:34,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:34,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692652812] [2021-08-12 20:10:34,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692652812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:34,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050801065] [2021-08-12 20:10:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:34,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:34,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 20:10:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:35,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050801065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:35,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:35,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 20:10:35,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782011104] [2021-08-12 20:10:35,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:10:35,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:35,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:10:35,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:35,028 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:35,979 INFO L93 Difference]: Finished difference Result 7688 states and 32615 transitions. [2021-08-12 20:10:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:10:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-08-12 20:10:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:36,000 INFO L225 Difference]: With dead ends: 7688 [2021-08-12 20:10:36,001 INFO L226 Difference]: Without dead ends: 7610 [2021-08-12 20:10:36,002 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:10:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-08-12 20:10:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-08-12 20:10:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-08-12 20:10:36,320 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-08-12 20:10:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:36,320 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-08-12 20:10:36,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-08-12 20:10:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:36,331 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:36,331 INFO L550 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] [2021-08-12 20:10:36,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:36,531 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash -787804976, now seen corresponding path program 1 times [2021-08-12 20:10:36,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:36,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904186989] [2021-08-12 20:10:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:36,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:36,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904186989] [2021-08-12 20:10:36,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904186989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:36,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525117103] [2021-08-12 20:10:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:10:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:36,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525117103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:36,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:36,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 20:10:36,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642937027] [2021-08-12 20:10:36,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:10:36,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:10:36,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:10:36,702 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:38,677 INFO L93 Difference]: Finished difference Result 15051 states and 62955 transitions. [2021-08-12 20:10:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:10:38,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:10:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:38,717 INFO L225 Difference]: With dead ends: 15051 [2021-08-12 20:10:38,717 INFO L226 Difference]: Without dead ends: 13926 [2021-08-12 20:10:38,722 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-08-12 20:10:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-08-12 20:10:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-08-12 20:10:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-08-12 20:10:39,201 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-08-12 20:10:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:39,201 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-08-12 20:10:39,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-08-12 20:10:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:39,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:39,216 INFO L550 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] [2021-08-12 20:10:39,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 20:10:39,417 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash -717911412, now seen corresponding path program 2 times [2021-08-12 20:10:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:39,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341219788] [2021-08-12 20:10:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:39,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:39,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341219788] [2021-08-12 20:10:39,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341219788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:39,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431527106] [2021-08-12 20:10:39,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:39,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:10:39,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:10:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:39,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431527106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:39,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:39,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 20:10:39,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134323020] [2021-08-12 20:10:39,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:10:39,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:39,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:10:39,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:10:39,540 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:41,570 INFO L93 Difference]: Finished difference Result 13290 states and 56460 transitions. [2021-08-12 20:10:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:10:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:10:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:41,605 INFO L225 Difference]: With dead ends: 13290 [2021-08-12 20:10:41,605 INFO L226 Difference]: Without dead ends: 12594 [2021-08-12 20:10:41,609 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-08-12 20:10:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-08-12 20:10:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-08-12 20:10:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-08-12 20:10:42,104 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-08-12 20:10:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:42,104 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-08-12 20:10:42,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-08-12 20:10:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:42,119 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:42,119 INFO L550 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] [2021-08-12 20:10:42,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:42,322 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1056551404, now seen corresponding path program 3 times [2021-08-12 20:10:42,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:42,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815310604] [2021-08-12 20:10:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:42,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815310604] [2021-08-12 20:10:42,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815310604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983863155] [2021-08-12 20:10:42,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:42,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:10:42,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 20:10:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:42,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983863155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:42,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 20:10:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583920983] [2021-08-12 20:10:42,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 20:10:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 20:10:42,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-12 20:10:42,559 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:47,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:47,213 INFO L93 Difference]: Finished difference Result 31606 states and 137112 transitions. [2021-08-12 20:10:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:10:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:10:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:47,314 INFO L225 Difference]: With dead ends: 31606 [2021-08-12 20:10:47,314 INFO L226 Difference]: Without dead ends: 29848 [2021-08-12 20:10:47,325 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:10:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-08-12 20:10:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-08-12 20:10:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-08-12 20:10:48,407 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-08-12 20:10:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:48,407 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-08-12 20:10:48,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-08-12 20:10:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:48,434 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:48,434 INFO L550 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] [2021-08-12 20:10:48,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 20:10:48,641 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:48,641 INFO L82 PathProgramCache]: Analyzing trace with hash -839523414, now seen corresponding path program 4 times [2021-08-12 20:10:48,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:48,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744461112] [2021-08-12 20:10:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:48,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:48,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744461112] [2021-08-12 20:10:48,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744461112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:48,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726446352] [2021-08-12 20:10:48,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:48,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:48,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 20:10:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:48,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726446352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:48,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:48,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-08-12 20:10:48,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788624563] [2021-08-12 20:10:48,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:10:48,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:10:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:10:48,770 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:53,844 INFO L93 Difference]: Finished difference Result 33177 states and 144774 transitions. [2021-08-12 20:10:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:10:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:10:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:53,937 INFO L225 Difference]: With dead ends: 33177 [2021-08-12 20:10:53,937 INFO L226 Difference]: Without dead ends: 30851 [2021-08-12 20:10:53,946 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:10:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-08-12 20:10:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-08-12 20:10:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-08-12 20:10:55,536 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-08-12 20:10:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:55,536 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-08-12 20:10:55,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-08-12 20:10:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:10:55,576 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:55,576 INFO L550 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] [2021-08-12 20:10:55,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:55,781 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1905173876, now seen corresponding path program 5 times [2021-08-12 20:10:55,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:55,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859744642] [2021-08-12 20:10:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:55,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:55,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859744642] [2021-08-12 20:10:55,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859744642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:55,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165403257] [2021-08-12 20:10:55,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:55,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:10:55,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:55,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 20:10:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:55,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165403257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:55,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:55,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:10:55,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883358398] [2021-08-12 20:10:55,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:10:55,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:55,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:10:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:10:55,962 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:00,581 INFO L93 Difference]: Finished difference Result 27653 states and 123759 transitions. [2021-08-12 20:11:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:11:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:11:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:00,687 INFO L225 Difference]: With dead ends: 27653 [2021-08-12 20:11:00,687 INFO L226 Difference]: Without dead ends: 27523 [2021-08-12 20:11:00,697 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:11:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-08-12 20:11:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-08-12 20:11:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-08-12 20:11:02,187 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-08-12 20:11:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:02,188 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-08-12 20:11:02,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-08-12 20:11:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:02,235 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:02,235 INFO L550 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] [2021-08-12 20:11:02,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 20:11:02,435 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:02,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2009638882, now seen corresponding path program 6 times [2021-08-12 20:11:02,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:02,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14160333] [2021-08-12 20:11:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:02,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:02,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14160333] [2021-08-12 20:11:02,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14160333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:02,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756554698] [2021-08-12 20:11:02,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:02,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:11:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 20:11:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:02,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756554698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:02,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:02,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:11:02,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334021705] [2021-08-12 20:11:02,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:11:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:11:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:11:02,598 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:06,147 INFO L93 Difference]: Finished difference Result 22703 states and 102072 transitions. [2021-08-12 20:11:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:11:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:11:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:06,243 INFO L225 Difference]: With dead ends: 22703 [2021-08-12 20:11:06,243 INFO L226 Difference]: Without dead ends: 22316 [2021-08-12 20:11:06,252 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:11:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-08-12 20:11:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-08-12 20:11:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-08-12 20:11:07,898 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-08-12 20:11:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:07,898 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-08-12 20:11:07,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-08-12 20:11:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:07,940 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:07,940 INFO L550 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] [2021-08-12 20:11:08,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 20:11:08,145 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1604748080, now seen corresponding path program 7 times [2021-08-12 20:11:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:08,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884094610] [2021-08-12 20:11:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:08,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884094610] [2021-08-12 20:11:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884094610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636832802] [2021-08-12 20:11:08,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 20:11:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:08,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636832802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:08,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:08,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-08-12 20:11:08,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011039447] [2021-08-12 20:11:08,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:11:08,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:11:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:11:08,304 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:14,747 INFO L93 Difference]: Finished difference Result 38277 states and 168337 transitions. [2021-08-12 20:11:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:11:14,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:11:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:14,936 INFO L225 Difference]: With dead ends: 38277 [2021-08-12 20:11:14,936 INFO L226 Difference]: Without dead ends: 37406 [2021-08-12 20:11:14,946 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:11:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-08-12 20:11:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-08-12 20:11:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-08-12 20:11:17,087 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-08-12 20:11:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:17,087 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-08-12 20:11:17,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-08-12 20:11:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:17,144 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:17,144 INFO L550 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] [2021-08-12 20:11:17,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 20:11:17,344 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash 544048456, now seen corresponding path program 8 times [2021-08-12 20:11:17,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:17,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813754310] [2021-08-12 20:11:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:17,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:17,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813754310] [2021-08-12 20:11:17,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813754310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:17,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443924027] [2021-08-12 20:11:17,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:17,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:11:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 20:11:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443924027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:17,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:17,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:11:17,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825618246] [2021-08-12 20:11:17,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:11:17,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:11:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:11:17,590 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:21,769 INFO L93 Difference]: Finished difference Result 26764 states and 121612 transitions. [2021-08-12 20:11:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:11:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:11:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:21,869 INFO L225 Difference]: With dead ends: 26764 [2021-08-12 20:11:21,870 INFO L226 Difference]: Without dead ends: 26388 [2021-08-12 20:11:21,877 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:11:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-08-12 20:11:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-08-12 20:11:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-08-12 20:11:23,821 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-08-12 20:11:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:23,821 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-08-12 20:11:23,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-08-12 20:11:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:24,008 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:24,008 INFO L550 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] [2021-08-12 20:11:24,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:24,209 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -792544304, now seen corresponding path program 1 times [2021-08-12 20:11:24,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:24,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505360932] [2021-08-12 20:11:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:24,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:24,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505360932] [2021-08-12 20:11:24,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505360932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:24,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147037367] [2021-08-12 20:11:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:24,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:11:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:24,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147037367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:24,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:24,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-12 20:11:24,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47223122] [2021-08-12 20:11:24,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:11:24,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:11:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:11:24,309 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:29,079 INFO L93 Difference]: Finished difference Result 28885 states and 130313 transitions. [2021-08-12 20:11:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 20:11:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:11:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:29,190 INFO L225 Difference]: With dead ends: 28885 [2021-08-12 20:11:29,191 INFO L226 Difference]: Without dead ends: 28616 [2021-08-12 20:11:29,199 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-12 20:11:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-08-12 20:11:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-08-12 20:11:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-08-12 20:11:31,310 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-08-12 20:11:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:31,311 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-08-12 20:11:31,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-08-12 20:11:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:31,368 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:31,368 INFO L550 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] [2021-08-12 20:11:31,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 20:11:31,569 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -341810224, now seen corresponding path program 2 times [2021-08-12 20:11:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:31,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678408393] [2021-08-12 20:11:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:31,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:31,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678408393] [2021-08-12 20:11:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678408393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764171915] [2021-08-12 20:11:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:31,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:11:31,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:11:31,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:31,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764171915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:31,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:31,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-12 20:11:31,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823171705] [2021-08-12 20:11:31,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:11:31,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:31,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:11:31,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:11:31,822 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:36,809 INFO L93 Difference]: Finished difference Result 31012 states and 139958 transitions. [2021-08-12 20:11:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:11:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:11:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:36,925 INFO L225 Difference]: With dead ends: 31012 [2021-08-12 20:11:36,926 INFO L226 Difference]: Without dead ends: 30645 [2021-08-12 20:11:36,935 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:11:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-08-12 20:11:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-08-12 20:11:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-08-12 20:11:38,833 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-08-12 20:11:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:38,834 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-08-12 20:11:38,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-08-12 20:11:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:38,888 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:38,888 INFO L550 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] [2021-08-12 20:11:39,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 20:11:39,089 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:39,089 INFO L82 PathProgramCache]: Analyzing trace with hash 35028364, now seen corresponding path program 3 times [2021-08-12 20:11:39,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:39,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775012110] [2021-08-12 20:11:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:39,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:39,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775012110] [2021-08-12 20:11:39,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775012110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:39,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207924331] [2021-08-12 20:11:39,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:39,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:11:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:11:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:39,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207924331] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:11:39,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 20:11:39,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-08-12 20:11:39,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387381508] [2021-08-12 20:11:39,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 20:11:39,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 20:11:39,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:11:39,210 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:45,143 INFO L93 Difference]: Finished difference Result 35181 states and 157826 transitions. [2021-08-12 20:11:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:11:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-08-12 20:11:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:45,276 INFO L225 Difference]: With dead ends: 35181 [2021-08-12 20:11:45,276 INFO L226 Difference]: Without dead ends: 33850 [2021-08-12 20:11:45,288 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:11:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-08-12 20:11:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-08-12 20:11:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-08-12 20:11:47,361 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-08-12 20:11:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:47,362 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-08-12 20:11:47,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-08-12 20:11:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:47,421 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:47,421 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:47,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:47,622 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-08-12 20:11:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:47,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326489740] [2021-08-12 20:11:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:47,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326489740] [2021-08-12 20:11:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326489740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980940905] [2021-08-12 20:11:47,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:47,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:11:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 20:11:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980940905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:47,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:47,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 20:11:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844735457] [2021-08-12 20:11:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:11:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:11:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:11:47,726 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:52,658 INFO L93 Difference]: Finished difference Result 29640 states and 134235 transitions. [2021-08-12 20:11:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:11:52,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-08-12 20:11:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:52,768 INFO L225 Difference]: With dead ends: 29640 [2021-08-12 20:11:52,768 INFO L226 Difference]: Without dead ends: 29562 [2021-08-12 20:11:52,780 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:11:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-08-12 20:11:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-08-12 20:11:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-08-12 20:11:54,756 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-08-12 20:11:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:54,756 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-08-12 20:11:54,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-08-12 20:11:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:11:54,815 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:54,815 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:55,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-12 20:11:55,015 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:55,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-08-12 20:11:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:55,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507849234] [2021-08-12 20:11:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:55,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:55,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507849234] [2021-08-12 20:11:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507849234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:55,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52185480] [2021-08-12 20:11:55,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:55,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 20:11:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 20:11:55,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:55,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52185480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:55,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:55,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 20:11:55,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956437723] [2021-08-12 20:11:55,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:11:55,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:55,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:11:55,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:11:55,148 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:00,209 INFO L93 Difference]: Finished difference Result 29554 states and 134051 transitions. [2021-08-12 20:12:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:12:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-08-12 20:12:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:00,316 INFO L225 Difference]: With dead ends: 29554 [2021-08-12 20:12:00,316 INFO L226 Difference]: Without dead ends: 29476 [2021-08-12 20:12:00,324 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:12:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-08-12 20:12:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-08-12 20:12:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-08-12 20:12:02,365 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-08-12 20:12:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:02,365 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-08-12 20:12:02,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-08-12 20:12:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:12:02,419 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:02,419 INFO L550 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] [2021-08-12 20:12:02,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:02,619 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-08-12 20:12:02,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:02,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004736686] [2021-08-12 20:12:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:02,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:02,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004736686] [2021-08-12 20:12:02,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004736686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:02,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90006918] [2021-08-12 20:12:02,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:02,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:12:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:12:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:02,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90006918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:02,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:02,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 20:12:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274259857] [2021-08-12 20:12:02,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:12:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:12:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:12:02,739 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:13,039 INFO L93 Difference]: Finished difference Result 65627 states and 297253 transitions. [2021-08-12 20:12:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:12:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:12:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:13,286 INFO L225 Difference]: With dead ends: 65627 [2021-08-12 20:12:13,286 INFO L226 Difference]: Without dead ends: 58083 [2021-08-12 20:12:13,313 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:12:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-08-12 20:12:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-08-12 20:12:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-08-12 20:12:18,207 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-08-12 20:12:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:18,207 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-08-12 20:12:18,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-08-12 20:12:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:12:18,350 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:18,350 INFO L550 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] [2021-08-12 20:12:18,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 20:12:18,565 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-08-12 20:12:18,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:18,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596585679] [2021-08-12 20:12:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:18,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596585679] [2021-08-12 20:12:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596585679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253130170] [2021-08-12 20:12:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:18,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:12:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:12:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:18,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253130170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:18,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:18,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 20:12:18,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701587642] [2021-08-12 20:12:18,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:12:18,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:12:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:12:18,713 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:34,695 INFO L93 Difference]: Finished difference Result 94516 states and 426596 transitions. [2021-08-12 20:12:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:12:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:12:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:35,258 INFO L225 Difference]: With dead ends: 94516 [2021-08-12 20:12:35,258 INFO L226 Difference]: Without dead ends: 83779 [2021-08-12 20:12:35,289 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-08-12 20:12:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-08-12 20:12:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-08-12 20:12:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-08-12 20:12:41,876 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-08-12 20:12:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:41,877 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-08-12 20:12:41,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-08-12 20:12:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:12:42,045 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:42,045 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 20:12:42,249 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-08-12 20:12:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905452732] [2021-08-12 20:12:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:42,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:42,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905452732] [2021-08-12 20:12:42,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905452732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:42,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935554195] [2021-08-12 20:12:42,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 20:12:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:42,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935554195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:42,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:42,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 20:12:42,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324151691] [2021-08-12 20:12:42,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:12:42,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:12:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:12:42,592 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:56,176 INFO L93 Difference]: Finished difference Result 74101 states and 339318 transitions. [2021-08-12 20:12:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:12:56,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-08-12 20:12:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:56,632 INFO L225 Difference]: With dead ends: 74101 [2021-08-12 20:12:56,632 INFO L226 Difference]: Without dead ends: 74023 [2021-08-12 20:12:56,650 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:12:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-08-12 20:13:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-08-12 20:13:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-08-12 20:13:03,075 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-08-12 20:13:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:13:03,075 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-08-12 20:13:03,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-08-12 20:13:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:13:03,259 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:13:03,259 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:13:03,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 20:13:03,460 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:13:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:13:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-08-12 20:13:03,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:13:03,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115810852] [2021-08-12 20:13:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:13:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:13:03,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:13:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115810852] [2021-08-12 20:13:03,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115810852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784096482] [2021-08-12 20:13:03,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:03,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:13:03,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:13:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 20:13:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:13:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:13:03,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784096482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:03,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:13:03,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-12 20:13:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727505717] [2021-08-12 20:13:03,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:13:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:13:03,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:13:03,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:13:03,598 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:13:16,740 INFO L93 Difference]: Finished difference Result 73876 states and 338537 transitions. [2021-08-12 20:13:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:13:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-08-12 20:13:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:13:17,205 INFO L225 Difference]: With dead ends: 73876 [2021-08-12 20:13:17,205 INFO L226 Difference]: Without dead ends: 73798 [2021-08-12 20:13:17,224 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:13:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-08-12 20:13:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-08-12 20:13:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-08-12 20:13:23,360 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-08-12 20:13:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:13:23,360 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-08-12 20:13:23,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-08-12 20:13:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:13:23,525 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:13:23,525 INFO L550 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] [2021-08-12 20:13:23,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 20:13:23,726 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:13:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:13:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-08-12 20:13:23,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:13:23,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354105783] [2021-08-12 20:13:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:13:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:23,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:13:23,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354105783] [2021-08-12 20:13:23,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354105783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:23,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015111034] [2021-08-12 20:13:23,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:23,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:13:23,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:13:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:13:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:13:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:23,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015111034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:23,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:13:23,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 20:13:23,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850001990] [2021-08-12 20:13:23,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:13:23,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:13:23,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:13:23,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:13:23,842 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:13:45,792 INFO L93 Difference]: Finished difference Result 134022 states and 608779 transitions. [2021-08-12 20:13:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:13:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-08-12 20:13:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:13:46,336 INFO L225 Difference]: With dead ends: 134022 [2021-08-12 20:13:46,336 INFO L226 Difference]: Without dead ends: 113660 [2021-08-12 20:13:46,383 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:13:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-08-12 20:13:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-08-12 20:13:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-08-12 20:13:55,555 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-08-12 20:13:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:13:55,555 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-08-12 20:13:55,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-08-12 20:13:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:13:55,818 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:13:55,818 INFO L550 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] [2021-08-12 20:13:56,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:56,033 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:13:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:13:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-08-12 20:13:56,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:13:56,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115441531] [2021-08-12 20:13:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:13:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:56,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:13:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115441531] [2021-08-12 20:13:56,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115441531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937086462] [2021-08-12 20:13:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:56,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 20:13:56,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:13:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 20:13:56,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:13:56,475 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-08-12 20:13:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937086462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:56,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:13:56,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 20:13:56,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049482229] [2021-08-12 20:13:56,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 20:13:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:13:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 20:13:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-12 20:13:56,495 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:14:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:14:36,958 INFO L93 Difference]: Finished difference Result 204929 states and 931198 transitions. [2021-08-12 20:14:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:14:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:14:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:14:38,123 INFO L225 Difference]: With dead ends: 204929 [2021-08-12 20:14:38,123 INFO L226 Difference]: Without dead ends: 199068 [2021-08-12 20:14:38,184 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:14:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-08-12 20:14:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-08-12 20:14:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:14:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-08-12 20:14:51,389 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-08-12 20:14:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:14:51,389 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-08-12 20:14:51,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:14:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-08-12 20:14:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 20:14:51,678 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:14:51,678 INFO L550 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] [2021-08-12 20:14:51,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 20:14:51,879 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:14:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:14:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 193179122, now seen corresponding path program 13 times [2021-08-12 20:14:51,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:14:51,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030710170] [2021-08-12 20:14:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:14:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:14:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:14:51,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:14:51,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030710170] [2021-08-12 20:14:51,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030710170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:14:51,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662991838] [2021-08-12 20:14:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:14:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:14:51,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 20:14:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:14:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:14:52,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662991838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:14:52,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:14:52,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 20:14:52,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037544969] [2021-08-12 20:14:52,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 20:14:52,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:14:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 20:14:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-12 20:14:52,028 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:15:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:15:35,317 INFO L93 Difference]: Finished difference Result 206611 states and 937760 transitions. [2021-08-12 20:15:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:15:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 20:15:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:15:36,506 INFO L225 Difference]: With dead ends: 206611 [2021-08-12 20:15:36,506 INFO L226 Difference]: Without dead ends: 206475 [2021-08-12 20:15:36,564 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:15:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states.