/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/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:09:37,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:09:37,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:09:37,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:09:37,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:09:37,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:09:37,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:09:37,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:09:37,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:09:37,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:09:37,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:09:37,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:09:37,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:09:37,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:09:37,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:09:37,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:09:37,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:09:37,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:09:37,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:09:37,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:09:37,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:09:37,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:09:37,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:09:37,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:09:37,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 17:09:37,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 17:09:37,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 17:09:37,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 17:09:37,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 17:09:37,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 17:09:37,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:09:37,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:09:37,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:09:37,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:09:37,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:09:37,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:09:37,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:09:37,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:09:37,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:09:37,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:09:37,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:09:37,704 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 [2021-07-09 17:09:37,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:09:37,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:09:37,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:09:37,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:09:37,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:09:37,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:09:37,753 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:09:37,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:09:37,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:09:37,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:09:37,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:09:37,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:09:37,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:09:37,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:09:37,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:09:37,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:09:37,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:09:37,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:09:37,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:09:37,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:09:37,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:09:37,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:09:37,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:09:37,757 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:09:37,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:09:37,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:09:38,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:09:38,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:09:38,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:09:38,082 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:09:38,083 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:09:38,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-07-09 17:09:38,084 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-07-09 17:09:38,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:09:38,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:09:38,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:38,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:09:38,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:09:38,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:38,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:09:38,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:09:38,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:09:38,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... [2021-07-09 17:09:38,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:09:38,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:09:38,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:09:38,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:09:38,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:09:38,205 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:09:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:09:38,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:09:38,206 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:09:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:09:38,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:09:38,206 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:09:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:09:38,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:09:38,207 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:09:38,362 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:09:38,362 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:09:38,364 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:38 BoogieIcfgContainer [2021-07-09 17:09:38,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:09:38,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:09:38,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:09:38,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:09:38,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:38" (1/2) ... [2021-07-09 17:09:38,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e8c1e2 and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:09:38, skipping insertion in model container [2021-07-09 17:09:38,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:38" (2/2) ... [2021-07-09 17:09:38,370 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-07-09 17:09:38,382 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:09:38,382 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:09:38,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:09:38,383 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:09:38,416 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:09:38,438 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:09:38,474 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:09:38,475 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:09:38,475 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:09:38,475 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:09:38,475 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:09:38,475 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:09:38,475 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:09:38,475 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:09:38,483 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-07-09 17:09:38,495 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:09:38,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:38,504 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:38,504 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -538755822, now seen corresponding path program 1 times [2021-07-09 17:09:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:38,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252992069] [2021-07-09 17:09:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:38,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252992069] [2021-07-09 17:09:38,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252992069] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:38,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:38,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:09:38,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281389593] [2021-07-09 17:09:38,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:09:38,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:09:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:09:38,644 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:38,666 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-07-09 17:09:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:09:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-07-09 17:09:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:38,692 INFO L225 Difference]: With dead ends: 54 [2021-07-09 17:09:38,692 INFO L226 Difference]: Without dead ends: 47 [2021-07-09 17:09:38,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:09:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-09 17:09:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-07-09 17:09:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-09 17:09:38,732 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-07-09 17:09:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:38,733 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-09 17:09:38,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-09 17:09:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:09:38,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:38,736 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:38,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:09:38,737 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1263691540, now seen corresponding path program 1 times [2021-07-09 17:09:38,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:38,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862671854] [2021-07-09 17:09:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:38,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862671854] [2021-07-09 17:09:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862671854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73819213] [2021-07-09 17:09:38,987 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 [2021-07-09 17:09:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:39,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73819213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:39,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:09:39,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623045201] [2021-07-09 17:09:39,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:39,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:39,200 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-07-09 17:09:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:39,320 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-07-09 17:09:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:39,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 13 [2021-07-09 17:09:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:39,323 INFO L225 Difference]: With dead ends: 65 [2021-07-09 17:09:39,323 INFO L226 Difference]: Without dead ends: 47 [2021-07-09 17:09:39,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-09 17:09:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-07-09 17:09:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-07-09 17:09:39,342 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-07-09 17:09:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,342 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-07-09 17:09:39,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-07-09 17:09:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-07-09 17:09:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:09:39,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,343 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:39,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:09:39,544 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1006944620, now seen corresponding path program 1 times [2021-07-09 17:09:39,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:39,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806842697] [2021-07-09 17:09:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:39,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806842697] [2021-07-09 17:09:39,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806842697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030089854] [2021-07-09 17:09:39,648 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 [2021-07-09 17:09:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030089854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:09:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637490824] [2021-07-09 17:09:39,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:39,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:39,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:39,800 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:39,828 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-07-09 17:09:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:09:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:09:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:39,829 INFO L225 Difference]: With dead ends: 52 [2021-07-09 17:09:39,829 INFO L226 Difference]: Without dead ends: 39 [2021-07-09 17:09:39,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-09 17:09:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-07-09 17:09:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-09 17:09:39,834 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-07-09 17:09:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,834 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-09 17:09:39,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,834 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-09 17:09:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:09:39,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,835 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:40,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,049 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 689628820, now seen corresponding path program 2 times [2021-07-09 17:09:40,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:40,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881065583] [2021-07-09 17:09:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:40,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881065583] [2021-07-09 17:09:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881065583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27210158] [2021-07-09 17:09:40,182 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:40,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27210158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:09:40,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799201507] [2021-07-09 17:09:40,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:40,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:40,308 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-07-09 17:09:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:40,406 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-07-09 17:09:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 13 [2021-07-09 17:09:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:40,407 INFO L225 Difference]: With dead ends: 64 [2021-07-09 17:09:40,407 INFO L226 Difference]: Without dead ends: 53 [2021-07-09 17:09:40,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-07-09 17:09:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-07-09 17:09:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-07-09 17:09:40,412 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-07-09 17:09:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:40,413 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-07-09 17:09:40,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-07-09 17:09:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-07-09 17:09:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:40,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:40,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:40,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,638 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1751181162, now seen corresponding path program 2 times [2021-07-09 17:09:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969693160] [2021-07-09 17:09:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:40,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969693160] [2021-07-09 17:09:40,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969693160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975374366] [2021-07-09 17:09:40,724 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 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 [2021-07-09 17:09:40,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:40,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:40,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975374366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:09:40,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628594119] [2021-07-09 17:09:40,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:40,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:40,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:40,867 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-07-09 17:09:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:41,007 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-07-09 17:09:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 15 [2021-07-09 17:09:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:41,008 INFO L225 Difference]: With dead ends: 73 [2021-07-09 17:09:41,008 INFO L226 Difference]: Without dead ends: 60 [2021-07-09 17:09:41,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-09 17:09:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-07-09 17:09:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-07-09 17:09:41,013 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-07-09 17:09:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:41,013 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-07-09 17:09:41,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-07-09 17:09:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-07-09 17:09:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:41,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:41,014 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:41,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:41,223 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:41,223 INFO L82 PathProgramCache]: Analyzing trace with hash 273149974, now seen corresponding path program 1 times [2021-07-09 17:09:41,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:41,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571223066] [2021-07-09 17:09:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:41,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:41,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571223066] [2021-07-09 17:09:41,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571223066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022919232] [2021-07-09 17:09:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:41,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022919232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:41,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 17:09:41,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522193760] [2021-07-09 17:09:41,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:09:41,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:09:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:41,679 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:41,832 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-07-09 17:09:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-07-09 17:09:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:41,834 INFO L225 Difference]: With dead ends: 69 [2021-07-09 17:09:41,834 INFO L226 Difference]: Without dead ends: 62 [2021-07-09 17:09:41,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-09 17:09:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-07-09 17:09:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-07-09 17:09:41,838 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-07-09 17:09:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:41,838 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-07-09 17:09:41,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-07-09 17:09:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:41,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:41,840 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:42,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-07-09 17:09:42,063 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash -109570414, now seen corresponding path program 2 times [2021-07-09 17:09:42,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:42,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594554848] [2021-07-09 17:09:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:42,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594554848] [2021-07-09 17:09:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594554848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50451720] [2021-07-09 17:09:42,155 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 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 [2021-07-09 17:09:42,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:42,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:42,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:42,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50451720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:42,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:42,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 17:09:42,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840699368] [2021-07-09 17:09:42,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:09:42,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:42,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:09:42,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:42,438 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:42,607 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-07-09 17:09:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-07-09 17:09:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:42,608 INFO L225 Difference]: With dead ends: 73 [2021-07-09 17:09:42,608 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 17:09:42,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 17:09:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-07-09 17:09:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-07-09 17:09:42,612 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-07-09 17:09:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:42,612 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-07-09 17:09:42,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-07-09 17:09:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:42,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:42,616 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:42,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:42,820 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:42,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1969723414, now seen corresponding path program 3 times [2021-07-09 17:09:42,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:42,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744443278] [2021-07-09 17:09:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:42,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:42,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744443278] [2021-07-09 17:09:42,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744443278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:42,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585279710] [2021-07-09 17:09:42,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:42,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:09:42,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:42,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585279710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:43,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 17:09:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278766411] [2021-07-09 17:09:43,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:09:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:09:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:43,185 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:43,406 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-07-09 17:09:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-07-09 17:09:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:43,407 INFO L225 Difference]: With dead ends: 94 [2021-07-09 17:09:43,407 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 17:09:43,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 17:09:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-07-09 17:09:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-07-09 17:09:43,412 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-07-09 17:09:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:43,412 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-07-09 17:09:43,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-07-09 17:09:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:43,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:43,413 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:43,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:43,637 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1985184210, now seen corresponding path program 4 times [2021-07-09 17:09:43,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:43,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678896206] [2021-07-09 17:09:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:43,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:43,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678896206] [2021-07-09 17:09:43,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678896206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542683093] [2021-07-09 17:09:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:43,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:43,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:43,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542683093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:43,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 17:09:43,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742591030] [2021-07-09 17:09:43,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:09:43,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:09:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:43,976 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:44,162 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-07-09 17:09:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-07-09 17:09:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:44,163 INFO L225 Difference]: With dead ends: 81 [2021-07-09 17:09:44,163 INFO L226 Difference]: Without dead ends: 74 [2021-07-09 17:09:44,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-09 17:09:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-07-09 17:09:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-07-09 17:09:44,167 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-07-09 17:09:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:44,167 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-07-09 17:09:44,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-09 17:09:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-07-09 17:09:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:44,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:44,168 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-07-09 17:09:44,389 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash 903122118, now seen corresponding path program 5 times [2021-07-09 17:09:44,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:44,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903305506] [2021-07-09 17:09:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:44,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903305506] [2021-07-09 17:09:44,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903305506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964427007] [2021-07-09 17:09:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:44,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:44,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:44,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964427007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:44,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:44,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:44,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392746410] [2021-07-09 17:09:44,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:44,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:44,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:44,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:44,644 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:44,740 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-07-09 17:09:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:44,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:44,741 INFO L225 Difference]: With dead ends: 72 [2021-07-09 17:09:44,741 INFO L226 Difference]: Without dead ends: 65 [2021-07-09 17:09:44,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-09 17:09:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-07-09 17:09:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-07-09 17:09:44,744 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-07-09 17:09:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:44,744 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-07-09 17:09:44,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-07-09 17:09:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:44,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:44,745 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:44,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:44,961 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1312551350, now seen corresponding path program 6 times [2021-07-09 17:09:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:44,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395158601] [2021-07-09 17:09:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:45,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:45,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395158601] [2021-07-09 17:09:45,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395158601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905623201] [2021-07-09 17:09:45,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:45,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:09:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:45,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905623201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:45,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:45,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524587821] [2021-07-09 17:09:45,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:45,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:45,276 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:45,436 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-07-09 17:09:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:45,438 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:09:45,438 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:09:45,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:09:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-07-09 17:09:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-09 17:09:45,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-09 17:09:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:45,445 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-09 17:09:45,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-09 17:09:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:45,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:45,446 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:45,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:45,653 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1297090554, now seen corresponding path program 7 times [2021-07-09 17:09:45,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:45,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720308981] [2021-07-09 17:09:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:45,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:45,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720308981] [2021-07-09 17:09:45,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720308981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702623180] [2021-07-09 17:09:45,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:45,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:45,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702623180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:45,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:45,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400627411] [2021-07-09 17:09:45,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:45,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:45,916 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:46,111 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-07-09 17:09:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:46,112 INFO L225 Difference]: With dead ends: 82 [2021-07-09 17:09:46,112 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:09:46,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:09:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-07-09 17:09:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-07-09 17:09:46,114 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-07-09 17:09:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:46,115 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-07-09 17:09:46,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-07-09 17:09:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:46,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:46,116 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:46,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 17:09:46,317 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:46,317 INFO L82 PathProgramCache]: Analyzing trace with hash 833619410, now seen corresponding path program 8 times [2021-07-09 17:09:46,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:46,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002824657] [2021-07-09 17:09:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:46,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:46,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002824657] [2021-07-09 17:09:46,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002824657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:46,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174590217] [2021-07-09 17:09:46,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:46,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:46,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:46,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174590217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:46,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:46,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:46,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836181325] [2021-07-09 17:09:46,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:46,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:46,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:46,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:46,580 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:46,736 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-07-09 17:09:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:46,737 INFO L225 Difference]: With dead ends: 92 [2021-07-09 17:09:46,737 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 17:09:46,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 17:09:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-07-09 17:09:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-09 17:09:46,740 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-09 17:09:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:46,741 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-09 17:09:46,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-09 17:09:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:46,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:46,742 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:46,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:09:46,961 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 849080206, now seen corresponding path program 9 times [2021-07-09 17:09:46,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:46,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444623235] [2021-07-09 17:09:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:47,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:47,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444623235] [2021-07-09 17:09:47,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444623235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:47,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631916836] [2021-07-09 17:09:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:47,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:47,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631916836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:47,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:47,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:47,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265830042] [2021-07-09 17:09:47,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:47,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:47,219 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:47,372 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-07-09 17:09:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:47,373 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:09:47,373 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:09:47,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:09:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-07-09 17:09:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-07-09 17:09:47,378 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-07-09 17:09:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:47,378 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-07-09 17:09:47,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-07-09 17:09:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:47,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:47,379 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:47,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:09:47,587 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1420535012, now seen corresponding path program 10 times [2021-07-09 17:09:47,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:47,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660364698] [2021-07-09 17:09:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:47,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:47,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660364698] [2021-07-09 17:09:47,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660364698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321450510] [2021-07-09 17:09:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:47,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:47,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321450510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:47,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:47,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:47,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795023114] [2021-07-09 17:09:47,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:47,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:47,854 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:47,971 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-07-09 17:09:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:47,972 INFO L225 Difference]: With dead ends: 75 [2021-07-09 17:09:47,972 INFO L226 Difference]: Without dead ends: 68 [2021-07-09 17:09:47,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-09 17:09:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-07-09 17:09:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-07-09 17:09:47,976 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-07-09 17:09:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:47,976 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-07-09 17:09:47,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-07-09 17:09:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:47,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:47,977 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:48,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:48,201 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1788920398, now seen corresponding path program 11 times [2021-07-09 17:09:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31234500] [2021-07-09 17:09:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:48,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31234500] [2021-07-09 17:09:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31234500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728921636] [2021-07-09 17:09:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:48,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:48,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728921636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:48,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:48,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754745619] [2021-07-09 17:09:48,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:48,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:48,483 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:48,618 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-07-09 17:09:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:48,619 INFO L225 Difference]: With dead ends: 76 [2021-07-09 17:09:48,619 INFO L226 Difference]: Without dead ends: 69 [2021-07-09 17:09:48,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-09 17:09:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-07-09 17:09:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-07-09 17:09:48,622 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-07-09 17:09:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:48,622 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-07-09 17:09:48,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-07-09 17:09:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:48,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:48,623 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:48,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:09:48,824 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash -426753070, now seen corresponding path program 12 times [2021-07-09 17:09:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:48,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124058590] [2021-07-09 17:09:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:48,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:48,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124058590] [2021-07-09 17:09:48,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124058590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322344431] [2021-07-09 17:09:48,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:48,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:09:48,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:49,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322344431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:49,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:49,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:49,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608759952] [2021-07-09 17:09:49,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:49,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:49,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:49,066 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:49,234 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-07-09 17:09:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:49,235 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:09:49,235 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:09:49,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:09:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-07-09 17:09:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-09 17:09:49,238 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-07-09 17:09:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:49,238 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-09 17:09:49,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-09 17:09:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:49,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:49,238 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:49,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:09:49,439 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -411292274, now seen corresponding path program 13 times [2021-07-09 17:09:49,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:49,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074991252] [2021-07-09 17:09:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:49,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:49,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074991252] [2021-07-09 17:09:49,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074991252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:49,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063480184] [2021-07-09 17:09:49,523 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 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 [2021-07-09 17:09:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:49,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063480184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:49,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:49,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:49,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354688951] [2021-07-09 17:09:49,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:49,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:49,678 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:49,830 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-07-09 17:09:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:49,831 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:09:49,831 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:09:49,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:09:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-07-09 17:09:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-07-09 17:09:49,833 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-07-09 17:09:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:49,834 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-07-09 17:09:49,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-07-09 17:09:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:49,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:49,834 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:50,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:09:50,049 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1719417690, now seen corresponding path program 14 times [2021-07-09 17:09:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:50,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562753841] [2021-07-09 17:09:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562753841] [2021-07-09 17:09:50,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562753841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018057080] [2021-07-09 17:09:50,124 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 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 [2021-07-09 17:09:50,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:50,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018057080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:50,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:50,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612189078] [2021-07-09 17:09:50,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:50,303 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:50,445 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-07-09 17:09:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:50,446 INFO L225 Difference]: With dead ends: 96 [2021-07-09 17:09:50,446 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:09:50,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:09:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-07-09 17:09:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-09 17:09:50,449 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-07-09 17:09:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:50,449 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-09 17:09:50,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-09 17:09:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:50,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:50,450 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:50,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:50,665 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1734878486, now seen corresponding path program 15 times [2021-07-09 17:09:50,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:50,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337881506] [2021-07-09 17:09:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:50,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337881506] [2021-07-09 17:09:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337881506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668063463] [2021-07-09 17:09:50,749 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 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 [2021-07-09 17:09:50,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:09:50,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668063463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:50,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:50,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830096303] [2021-07-09 17:09:50,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:50,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:50,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:50,903 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:51,053 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-07-09 17:09:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:51,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:51,053 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:09:51,054 INFO L226 Difference]: Without dead ends: 95 [2021-07-09 17:09:51,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-09 17:09:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-07-09 17:09:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-07-09 17:09:51,056 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-07-09 17:09:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:51,056 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-07-09 17:09:51,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-07-09 17:09:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:51,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:51,057 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:51,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:51,265 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1988634004, now seen corresponding path program 16 times [2021-07-09 17:09:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:51,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079604809] [2021-07-09 17:09:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:51,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079604809] [2021-07-09 17:09:51,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079604809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102029463] [2021-07-09 17:09:51,339 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 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 [2021-07-09 17:09:51,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:51,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:51,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:51,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102029463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:51,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:09:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069829900] [2021-07-09 17:09:51,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:51,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:51,510 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:51,615 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-07-09 17:09:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 15 [2021-07-09 17:09:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:51,616 INFO L225 Difference]: With dead ends: 79 [2021-07-09 17:09:51,616 INFO L226 Difference]: Without dead ends: 72 [2021-07-09 17:09:51,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-09 17:09:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-07-09 17:09:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-07-09 17:09:51,624 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-07-09 17:09:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:51,624 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-07-09 17:09:51,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-07-09 17:09:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:51,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:51,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:51,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:09:51,849 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:51,850 INFO L82 PathProgramCache]: Analyzing trace with hash 625326102, now seen corresponding path program 17 times [2021-07-09 17:09:51,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:51,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058280314] [2021-07-09 17:09:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:51,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:51,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058280314] [2021-07-09 17:09:51,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058280314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544035850] [2021-07-09 17:09:51,921 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 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 [2021-07-09 17:09:51,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:51,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:51,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:52,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544035850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:52,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:09:52,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853375656] [2021-07-09 17:09:52,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:52,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:52,071 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:52,229 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-07-09 17:09:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:52,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 15 [2021-07-09 17:09:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:52,230 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:09:52,230 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:09:52,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:09:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-07-09 17:09:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-07-09 17:09:52,233 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-07-09 17:09:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:52,233 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-07-09 17:09:52,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-07-09 17:09:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:52,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:52,233 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:52,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:09:52,449 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash 640786898, now seen corresponding path program 18 times [2021-07-09 17:09:52,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:52,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575474340] [2021-07-09 17:09:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:52,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:52,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575474340] [2021-07-09 17:09:52,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575474340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945895752] [2021-07-09 17:09:52,535 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 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 [2021-07-09 17:09:52,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:09:52,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:52,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945895752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:52,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:09:52,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165880559] [2021-07-09 17:09:52,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:52,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:52,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:52,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:52,725 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:52,880 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-07-09 17:09:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 15 [2021-07-09 17:09:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:52,881 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:09:52,881 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:09:52,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:09:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-07-09 17:09:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-07-09 17:09:52,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-07-09 17:09:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:52,884 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-07-09 17:09:52,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-07-09 17:09:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:52,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:52,884 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:53,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:53,105 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1212241704, now seen corresponding path program 19 times [2021-07-09 17:09:53,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:53,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264924600] [2021-07-09 17:09:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264924600] [2021-07-09 17:09:53,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264924600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945520628] [2021-07-09 17:09:53,190 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 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 [2021-07-09 17:09:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945520628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:53,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:09:53,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67725317] [2021-07-09 17:09:53,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:53,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:53,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:53,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:53,354 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:53,470 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-07-09 17:09:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 15 [2021-07-09 17:09:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:53,471 INFO L225 Difference]: With dead ends: 85 [2021-07-09 17:09:53,471 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 17:09:53,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 17:09:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-07-09 17:09:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-07-09 17:09:53,473 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-07-09 17:09:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:53,473 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-07-09 17:09:53,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-07-09 17:09:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:53,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:53,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:53,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:09:53,677 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash 51263382, now seen corresponding path program 3 times [2021-07-09 17:09:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:53,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156505374] [2021-07-09 17:09:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:53,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156505374] [2021-07-09 17:09:53,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156505374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471245143] [2021-07-09 17:09:53,790 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 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 [2021-07-09 17:09:53,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:53,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:53,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471245143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:53,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:09:53,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744415390] [2021-07-09 17:09:53,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:53,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:53,876 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2021-07-09 17:09:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:54,008 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-07-09 17:09:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:54,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 15 [2021-07-09 17:09:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:54,009 INFO L225 Difference]: With dead ends: 92 [2021-07-09 17:09:54,009 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 17:09:54,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 17:09:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-07-09 17:09:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-07-09 17:09:54,012 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-07-09 17:09:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:54,012 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-07-09 17:09:54,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2021-07-09 17:09:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-07-09 17:09:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:54,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:54,012 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:54,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:54,221 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash 674386126, now seen corresponding path program 20 times [2021-07-09 17:09:54,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:54,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017979937] [2021-07-09 17:09:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:54,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017979937] [2021-07-09 17:09:54,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017979937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972407189] [2021-07-09 17:09:54,294 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 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 [2021-07-09 17:09:54,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:54,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:54,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972407189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:54,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:54,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:09:54,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108661168] [2021-07-09 17:09:54,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:54,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:54,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:54,455 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:54,585 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-07-09 17:09:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 15 [2021-07-09 17:09:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:54,587 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:09:54,587 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:09:54,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:09:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-07-09 17:09:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-07-09 17:09:54,589 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-07-09 17:09:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:54,589 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-07-09 17:09:54,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-07-09 17:09:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-07-09 17:09:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:54,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:54,590 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:54,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:09:54,805 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash 59077016, now seen corresponding path program 3 times [2021-07-09 17:09:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:54,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690873875] [2021-07-09 17:09:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:54,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:54,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690873875] [2021-07-09 17:09:54,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690873875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:54,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339459901] [2021-07-09 17:09:54,896 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 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 [2021-07-09 17:09:54,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:54,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339459901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:55,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:55,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:09:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907269270] [2021-07-09 17:09:55,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:55,025 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2021-07-09 17:09:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:55,218 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-07-09 17:09:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:55,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 17 [2021-07-09 17:09:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:55,219 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:09:55,219 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:09:55,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:09:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-07-09 17:09:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-07-09 17:09:55,221 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-07-09 17:09:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:55,221 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-07-09 17:09:55,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2021-07-09 17:09:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-07-09 17:09:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:55,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:55,222 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:55,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:09:55,425 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2083408152, now seen corresponding path program 21 times [2021-07-09 17:09:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336710096] [2021-07-09 17:09:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:55,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336710096] [2021-07-09 17:09:55,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336710096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:55,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541035063] [2021-07-09 17:09:55,519 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 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 [2021-07-09 17:09:55,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:55,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:09:55,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:55,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541035063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:55,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:55,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:09:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110016455] [2021-07-09 17:09:55,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:55,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:55,770 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:56,091 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-07-09 17:09:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:09:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:56,092 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:09:56,092 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:09:56,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:09:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-07-09 17:09:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-07-09 17:09:56,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-07-09 17:09:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:56,095 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-07-09 17:09:56,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-07-09 17:09:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:56,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:56,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:56,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:09:56,305 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1700687764, now seen corresponding path program 22 times [2021-07-09 17:09:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:56,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400910731] [2021-07-09 17:09:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:56,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400910731] [2021-07-09 17:09:56,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400910731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772552727] [2021-07-09 17:09:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:56,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:09:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:56,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772552727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:56,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:56,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:09:56,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815753878] [2021-07-09 17:09:56,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:56,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:56,605 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:56,865 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-07-09 17:09:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:09:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:56,866 INFO L225 Difference]: With dead ends: 104 [2021-07-09 17:09:56,866 INFO L226 Difference]: Without dead ends: 97 [2021-07-09 17:09:56,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-09 17:09:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-07-09 17:09:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-09 17:09:56,868 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-07-09 17:09:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:56,869 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-09 17:09:56,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-09 17:09:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:56,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:56,869 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:57,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:09:57,076 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -514985704, now seen corresponding path program 23 times [2021-07-09 17:09:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:57,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950653099] [2021-07-09 17:09:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:57,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:57,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950653099] [2021-07-09 17:09:57,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950653099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:57,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420566466] [2021-07-09 17:09:57,176 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 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 [2021-07-09 17:09:57,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:57,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:09:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420566466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:57,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:57,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:09:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296752482] [2021-07-09 17:09:57,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:57,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:57,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:57,375 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:57,717 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-07-09 17:09:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:09:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:57,719 INFO L225 Difference]: With dead ends: 130 [2021-07-09 17:09:57,719 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:09:57,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:09:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-07-09 17:09:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-09 17:09:57,721 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-09 17:09:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:57,722 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-09 17:09:57,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-09 17:09:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:57,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:57,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:57,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:57,937 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -499524908, now seen corresponding path program 24 times [2021-07-09 17:09:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:57,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103654198] [2021-07-09 17:09:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:58,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103654198] [2021-07-09 17:09:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103654198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291041028] [2021-07-09 17:09:58,042 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 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 [2021-07-09 17:09:58,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:09:58,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:09:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:58,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291041028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:58,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:09:58,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036616908] [2021-07-09 17:09:58,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:58,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:58,247 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:58,595 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-07-09 17:09:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:09:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:58,596 INFO L225 Difference]: With dead ends: 113 [2021-07-09 17:09:58,596 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:09:58,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:09:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:09:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-07-09 17:09:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-07-09 17:09:58,599 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-07-09 17:09:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:58,599 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-07-09 17:09:58,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-07-09 17:09:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:58,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:58,600 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:58,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:58,823 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1651089708, now seen corresponding path program 25 times [2021-07-09 17:09:58,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:58,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142376389] [2021-07-09 17:09:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:58,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142376389] [2021-07-09 17:09:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142376389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182157111] [2021-07-09 17:09:58,930 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 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 [2021-07-09 17:09:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:09:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:59,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182157111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:59,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:09:59,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121721911] [2021-07-09 17:09:59,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:59,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:59,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:59,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:59,125 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:59,396 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-07-09 17:09:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:09:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:59,397 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:09:59,397 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 17:09:59,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 17:09:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-07-09 17:09:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-09 17:09:59,400 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-09 17:09:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:59,400 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-09 17:09:59,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:09:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-09 17:09:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:59,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:59,400 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:59,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:59,601 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1635628912, now seen corresponding path program 26 times [2021-07-09 17:09:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:59,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878589273] [2021-07-09 17:09:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:59,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878589273] [2021-07-09 17:09:59,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878589273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205823248] [2021-07-09 17:09:59,703 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 [2021-07-09 17:09:59,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:09:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:59,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205823248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:59,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:09:59,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781149933] [2021-07-09 17:09:59,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:59,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:59,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:59,936 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:00,206 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-07-09 17:10:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:00,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:00,207 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:10:00,207 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:10:00,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:10:00,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-07-09 17:10:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-09 17:10:00,210 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-07-09 17:10:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:00,210 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-09 17:10:00,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-09 17:10:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:00,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:00,211 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:00,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:10:00,425 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1064174106, now seen corresponding path program 27 times [2021-07-09 17:10:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:00,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113313613] [2021-07-09 17:10:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:00,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:00,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113313613] [2021-07-09 17:10:00,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113313613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:00,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789743017] [2021-07-09 17:10:00,526 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 [2021-07-09 17:10:00,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:00,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:00,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789743017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:00,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:00,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259642977] [2021-07-09 17:10:00,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:00,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:00,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:00,730 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:00,892 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-07-09 17:10:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:00,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:00,896 INFO L225 Difference]: With dead ends: 96 [2021-07-09 17:10:00,896 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:10:00,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:10:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-07-09 17:10:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-07-09 17:10:00,898 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-07-09 17:10:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:00,898 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-07-09 17:10:00,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-07-09 17:10:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:00,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:00,899 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:01,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:01,113 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444760, now seen corresponding path program 28 times [2021-07-09 17:10:01,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:01,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176708818] [2021-07-09 17:10:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:01,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176708818] [2021-07-09 17:10:01,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176708818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292925902] [2021-07-09 17:10:01,201 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 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 [2021-07-09 17:10:01,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:01,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292925902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:01,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:10:01,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671803142] [2021-07-09 17:10:01,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:10:01,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:10:01,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:01,434 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:01,976 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-07-09 17:10:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:01,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-09 17:10:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:01,976 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:10:01,976 INFO L226 Difference]: Without dead ends: 76 [2021-07-09 17:10:01,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-09 17:10:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-07-09 17:10:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-07-09 17:10:01,978 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-07-09 17:10:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:01,978 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-07-09 17:10:01,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-07-09 17:10:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:01,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:01,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:02,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:10:02,179 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -695788720, now seen corresponding path program 29 times [2021-07-09 17:10:02,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:02,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260298581] [2021-07-09 17:10:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:02,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260298581] [2021-07-09 17:10:02,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260298581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137540828] [2021-07-09 17:10:02,275 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 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 [2021-07-09 17:10:02,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:10:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:02,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137540828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:02,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499125125] [2021-07-09 17:10:02,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:02,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:02,481 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:02,739 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-07-09 17:10:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:02,741 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:10:02,741 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:10:02,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:10:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-07-09 17:10:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-09 17:10:02,743 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-07-09 17:10:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:02,744 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-09 17:10:02,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-09 17:10:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:02,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:02,744 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:02,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:02,961 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:02,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1383505108, now seen corresponding path program 30 times [2021-07-09 17:10:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:02,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438194581] [2021-07-09 17:10:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:03,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438194581] [2021-07-09 17:10:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438194581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192494296] [2021-07-09 17:10:03,066 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 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 [2021-07-09 17:10:03,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:03,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:03,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192494296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:03,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:03,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182584366] [2021-07-09 17:10:03,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:03,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:03,259 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:03,612 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-07-09 17:10:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:03,613 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:10:03,613 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:10:03,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:10:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-07-09 17:10:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-09 17:10:03,615 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-09 17:10:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:03,615 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-09 17:10:03,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-09 17:10:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:03,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:03,616 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:03,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:10:03,816 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1398965904, now seen corresponding path program 31 times [2021-07-09 17:10:03,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:03,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851762854] [2021-07-09 17:10:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:03,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851762854] [2021-07-09 17:10:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851762854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767633612] [2021-07-09 17:10:03,903 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 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 [2021-07-09 17:10:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:03,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:04,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767633612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:04,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:04,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555326245] [2021-07-09 17:10:04,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:04,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:04,123 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:04,478 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-07-09 17:10:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:04,481 INFO L225 Difference]: With dead ends: 122 [2021-07-09 17:10:04,482 INFO L226 Difference]: Without dead ends: 115 [2021-07-09 17:10:04,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-09 17:10:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-07-09 17:10:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-07-09 17:10:04,486 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-07-09 17:10:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:04,487 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-07-09 17:10:04,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-07-09 17:10:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:04,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:04,487 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:04,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:10:04,705 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -765291428, now seen corresponding path program 32 times [2021-07-09 17:10:04,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:04,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501366182] [2021-07-09 17:10:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:04,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:04,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501366182] [2021-07-09 17:10:04,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501366182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085127921] [2021-07-09 17:10:04,814 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 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 [2021-07-09 17:10:04,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085127921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:05,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:05,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334883399] [2021-07-09 17:10:05,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:05,005 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:05,322 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-07-09 17:10:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:05,323 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:10:05,323 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:10:05,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:10:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-07-09 17:10:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-09 17:10:05,326 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-09 17:10:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:05,326 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-09 17:10:05,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-09 17:10:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:05,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:05,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:05,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:10:05,545 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:05,545 INFO L82 PathProgramCache]: Analyzing trace with hash -749830632, now seen corresponding path program 33 times [2021-07-09 17:10:05,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:05,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159191648] [2021-07-09 17:10:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:05,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:05,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159191648] [2021-07-09 17:10:05,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159191648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049263581] [2021-07-09 17:10:05,632 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 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 [2021-07-09 17:10:05,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:05,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:05,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049263581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:05,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595483165] [2021-07-09 17:10:05,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:05,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:05,827 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:06,215 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-07-09 17:10:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:06,216 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:10:06,216 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:10:06,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:10:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-07-09 17:10:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-09 17:10:06,218 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-07-09 17:10:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:06,218 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-09 17:10:06,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-09 17:10:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:06,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:06,219 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:06,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:10:06,429 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:06,429 INFO L82 PathProgramCache]: Analyzing trace with hash -178375826, now seen corresponding path program 34 times [2021-07-09 17:10:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:06,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596769005] [2021-07-09 17:10:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:06,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:06,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596769005] [2021-07-09 17:10:06,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596769005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027760973] [2021-07-09 17:10:06,519 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 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 [2021-07-09 17:10:06,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:06,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:06,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027760973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:06,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:06,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227688422] [2021-07-09 17:10:06,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:06,714 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:07,014 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-07-09 17:10:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:07,015 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:10:07,015 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:10:07,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:10:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-07-09 17:10:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-07-09 17:10:07,017 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-07-09 17:10:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:07,018 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-07-09 17:10:07,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-07-09 17:10:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:07,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:07,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:07,233 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1859383016, now seen corresponding path program 35 times [2021-07-09 17:10:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:07,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946924051] [2021-07-09 17:10:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:07,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:07,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946924051] [2021-07-09 17:10:07,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946924051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807016740] [2021-07-09 17:10:07,326 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 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 [2021-07-09 17:10:07,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:10:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:07,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:07,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807016740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:07,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:07,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021167607] [2021-07-09 17:10:07,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:07,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:07,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:07,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:07,519 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:07,936 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-07-09 17:10:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:07,937 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:10:07,937 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:10:07,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:10:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-07-09 17:10:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-07-09 17:10:07,939 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-07-09 17:10:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:07,940 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-07-09 17:10:07,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-07-09 17:10:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:07,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:08,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 17:10:08,157 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1843922220, now seen corresponding path program 36 times [2021-07-09 17:10:08,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:08,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958356765] [2021-07-09 17:10:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:08,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958356765] [2021-07-09 17:10:08,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958356765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863519985] [2021-07-09 17:10:08,267 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 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 [2021-07-09 17:10:08,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:08,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863519985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:08,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:08,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090591563] [2021-07-09 17:10:08,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:08,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:08,451 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:08,929 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-07-09 17:10:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:10:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:08,930 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:10:08,930 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:10:08,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:10:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-07-09 17:10:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-07-09 17:10:08,933 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-07-09 17:10:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:08,933 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-07-09 17:10:08,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-07-09 17:10:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:08,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:08,934 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,149 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1272467414, now seen corresponding path program 37 times [2021-07-09 17:10:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:09,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640840820] [2021-07-09 17:10:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:09,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:09,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640840820] [2021-07-09 17:10:09,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640840820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800498174] [2021-07-09 17:10:09,237 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:09,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800498174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:09,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:09,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195993009] [2021-07-09 17:10:09,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:09,410 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:09,793 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-07-09 17:10:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:09,793 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:10:09,794 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:10:09,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:10:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-07-09 17:10:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-07-09 17:10:09,796 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-07-09 17:10:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:09,796 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-07-09 17:10:09,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-07-09 17:10:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:09,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:09,797 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:10,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:10,013 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 164948120, now seen corresponding path program 38 times [2021-07-09 17:10:10,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:10,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444773281] [2021-07-09 17:10:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:10,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:10,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444773281] [2021-07-09 17:10:10,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444773281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125568704] [2021-07-09 17:10:10,090 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:10,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:10,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125568704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:10,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:10:10,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203056702] [2021-07-09 17:10:10,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:10:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:10:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:10,291 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:10,828 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-07-09 17:10:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-09 17:10:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:10,829 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:10:10,829 INFO L226 Difference]: Without dead ends: 107 [2021-07-09 17:10:10,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-09 17:10:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-07-09 17:10:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-07-09 17:10:10,832 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-07-09 17:10:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:10,832 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-07-09 17:10:10,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-07-09 17:10:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:10,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:10,832 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:11,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:10:11,033 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash -217772268, now seen corresponding path program 39 times [2021-07-09 17:10:11,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:11,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265088443] [2021-07-09 17:10:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:11,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265088443] [2021-07-09 17:10:11,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265088443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827375659] [2021-07-09 17:10:11,114 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:11,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:11,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:11,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:11,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827375659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:11,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:10:11,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506825470] [2021-07-09 17:10:11,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:10:11,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:10:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:11,334 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:11,692 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-07-09 17:10:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-09 17:10:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:11,693 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:10:11,693 INFO L226 Difference]: Without dead ends: 104 [2021-07-09 17:10:11,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-09 17:10:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-07-09 17:10:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-07-09 17:10:11,695 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-07-09 17:10:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:11,695 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-07-09 17:10:11,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-07-09 17:10:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:11,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:11,695 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:11,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:10:11,896 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1861521560, now seen corresponding path program 40 times [2021-07-09 17:10:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:11,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012869659] [2021-07-09 17:10:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:11,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012869659] [2021-07-09 17:10:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012869659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113926711] [2021-07-09 17:10:11,980 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:12,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:12,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:12,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113926711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:12,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:12,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:10:12,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929148919] [2021-07-09 17:10:12,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:10:12,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:10:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:12,232 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:12,875 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-07-09 17:10:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-09 17:10:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:12,878 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:10:12,879 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:10:12,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:10:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:10:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-07-09 17:10:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-07-09 17:10:12,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-07-09 17:10:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:12,883 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-07-09 17:10:12,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-07-09 17:10:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:12,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:12,883 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:13,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:10:13,097 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1876982356, now seen corresponding path program 41 times [2021-07-09 17:10:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:13,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242382280] [2021-07-09 17:10:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:13,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242382280] [2021-07-09 17:10:13,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242382280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811810613] [2021-07-09 17:10:13,186 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:13,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811810613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:13,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:13,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:10:13,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198465478] [2021-07-09 17:10:13,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:10:13,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:10:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:13,406 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:14,095 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-07-09 17:10:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:10:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-09 17:10:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:14,096 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:10:14,096 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:10:14,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:10:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:10:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-07-09 17:10:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-07-09 17:10:14,099 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-07-09 17:10:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:14,099 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-07-09 17:10:14,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-09 17:10:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-07-09 17:10:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:14,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:14,099 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:14,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,300 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1810322992, now seen corresponding path program 42 times [2021-07-09 17:10:14,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:14,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917265515] [2021-07-09 17:10:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:14,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:14,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917265515] [2021-07-09 17:10:14,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917265515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128087785] [2021-07-09 17:10:14,381 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:14,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:14,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128087785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:14,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:14,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790555310] [2021-07-09 17:10:14,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:14,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:14,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:14,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:14,555 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:14,872 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-07-09 17:10:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:14,873 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:10:14,873 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:10:14,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:10:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-07-09 17:10:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-07-09 17:10:14,875 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-07-09 17:10:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:14,875 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-07-09 17:10:14,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-07-09 17:10:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:14,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:14,876 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:15,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:10:15,097 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:15,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1561329620, now seen corresponding path program 43 times [2021-07-09 17:10:15,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:15,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812203487] [2021-07-09 17:10:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:15,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812203487] [2021-07-09 17:10:15,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812203487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119714835] [2021-07-09 17:10:15,189 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:15,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:15,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119714835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:15,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:15,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531080819] [2021-07-09 17:10:15,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:15,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:15,358 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:15,712 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-07-09 17:10:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:15,713 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:10:15,713 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:10:15,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:10:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-07-09 17:10:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-07-09 17:10:15,716 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-07-09 17:10:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:15,716 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-07-09 17:10:15,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-07-09 17:10:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:15,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:15,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:15,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:10:15,925 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1576790416, now seen corresponding path program 44 times [2021-07-09 17:10:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726787804] [2021-07-09 17:10:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:16,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:16,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726787804] [2021-07-09 17:10:16,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726787804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:16,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731885596] [2021-07-09 17:10:16,028 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:16,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:16,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:16,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:16,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731885596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:16,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:16,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:16,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328611143] [2021-07-09 17:10:16,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:16,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:16,225 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:16,663 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-07-09 17:10:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:16,664 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:10:16,664 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:10:16,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:10:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-07-09 17:10:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-07-09 17:10:16,667 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-07-09 17:10:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:16,667 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-07-09 17:10:16,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-07-09 17:10:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:16,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:16,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:16,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:16,868 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2146722074, now seen corresponding path program 45 times [2021-07-09 17:10:16,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:16,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033955999] [2021-07-09 17:10:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:16,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:16,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033955999] [2021-07-09 17:10:16,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033955999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:16,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128740766] [2021-07-09 17:10:16,949 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:16,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128740766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:17,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:17,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997360297] [2021-07-09 17:10:17,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:17,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:17,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:17,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:17,143 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:17,499 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-07-09 17:10:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:17,500 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:10:17,500 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:10:17,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:10:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-07-09 17:10:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-07-09 17:10:17,502 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-07-09 17:10:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:17,502 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-07-09 17:10:17,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-07-09 17:10:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:17,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:17,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:17,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 17:10:17,721 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash -709306540, now seen corresponding path program 46 times [2021-07-09 17:10:17,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:17,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754061000] [2021-07-09 17:10:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:17,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:17,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754061000] [2021-07-09 17:10:17,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754061000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128665613] [2021-07-09 17:10:17,807 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:17,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:17,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:18,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128665613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:18,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:18,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655752203] [2021-07-09 17:10:18,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:18,002 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:18,255 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-07-09 17:10:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:18,256 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:10:18,256 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:10:18,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:10:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-07-09 17:10:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-07-09 17:10:18,259 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-07-09 17:10:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:18,259 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-07-09 17:10:18,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-07-09 17:10:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:18,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:18,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:18,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:18,473 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1092026928, now seen corresponding path program 47 times [2021-07-09 17:10:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:18,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853026109] [2021-07-09 17:10:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:18,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:18,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853026109] [2021-07-09 17:10:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853026109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877164453] [2021-07-09 17:10:18,592 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:18,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:10:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877164453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:18,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:18,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677074059] [2021-07-09 17:10:18,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:18,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:18,816 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:19,184 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-07-09 17:10:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:19,185 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:10:19,185 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:10:19,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:10:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-07-09 17:10:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-07-09 17:10:19,187 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-07-09 17:10:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:19,187 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-07-09 17:10:19,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-07-09 17:10:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:19,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:19,188 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:19,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 17:10:19,401 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash 987266900, now seen corresponding path program 48 times [2021-07-09 17:10:19,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:19,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144688333] [2021-07-09 17:10:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:19,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:19,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144688333] [2021-07-09 17:10:19,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144688333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:19,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321857655] [2021-07-09 17:10:19,483 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:19,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321857655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:19,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:19,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:19,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295098057] [2021-07-09 17:10:19,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:19,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:19,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:19,654 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:20,056 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-07-09 17:10:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:10:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:20,057 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:10:20,057 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:10:20,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:10:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-07-09 17:10:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-07-09 17:10:20,059 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-07-09 17:10:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:20,060 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-07-09 17:10:20,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-07-09 17:10:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:20,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:20,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:20,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:10:20,277 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1002727696, now seen corresponding path program 49 times [2021-07-09 17:10:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298735823] [2021-07-09 17:10:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:20,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298735823] [2021-07-09 17:10:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298735823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468791174] [2021-07-09 17:10:20,362 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:20,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468791174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:20,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:20,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:20,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906015686] [2021-07-09 17:10:20,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:20,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:20,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:20,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:20,531 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:20,880 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-07-09 17:10:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:20,881 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:10:20,881 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:10:20,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:10:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-07-09 17:10:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-07-09 17:10:20,883 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-07-09 17:10:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:20,883 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-07-09 17:10:20,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-07-09 17:10:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:20,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:20,884 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:21,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:21,093 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389644, now seen corresponding path program 50 times [2021-07-09 17:10:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:21,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461205070] [2021-07-09 17:10:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:21,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:21,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461205070] [2021-07-09 17:10:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461205070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031158369] [2021-07-09 17:10:21,174 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:21,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:21,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031158369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:21,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:21,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097913016] [2021-07-09 17:10:21,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:21,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:21,363 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:21,774 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-07-09 17:10:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:10:21,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:21,775 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:10:21,775 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:10:21,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:10:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:10:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-07-09 17:10:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-07-09 17:10:21,778 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-07-09 17:10:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:21,778 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-07-09 17:10:21,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-07-09 17:10:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:21,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:21,778 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:21,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:10:21,993 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -79334396, now seen corresponding path program 51 times [2021-07-09 17:10:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288711066] [2021-07-09 17:10:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:22,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288711066] [2021-07-09 17:10:22,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288711066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904452898] [2021-07-09 17:10:22,085 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:22,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904452898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:22,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:22,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55781741] [2021-07-09 17:10:22,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:22,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:22,325 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:22,553 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-07-09 17:10:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:22,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:22,554 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:10:22,554 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:10:22,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:10:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-07-09 17:10:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-09 17:10:22,555 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-09 17:10:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:22,555 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-09 17:10:22,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-09 17:10:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:22,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:22,556 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:22,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:22,757 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:22,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1999959432, now seen corresponding path program 52 times [2021-07-09 17:10:22,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:22,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716204804] [2021-07-09 17:10:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:22,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716204804] [2021-07-09 17:10:22,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716204804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149613302] [2021-07-09 17:10:22,841 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:22,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149613302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:23,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:23,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075792303] [2021-07-09 17:10:23,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:23,024 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:23,354 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-07-09 17:10:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:23,355 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:10:23,355 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:10:23,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:10:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-07-09 17:10:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-07-09 17:10:23,357 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-07-09 17:10:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:23,357 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-07-09 17:10:23,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-07-09 17:10:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:23,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:23,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:23,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 17:10:23,573 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2015420228, now seen corresponding path program 53 times [2021-07-09 17:10:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:23,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446978008] [2021-07-09 17:10:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:23,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:23,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446978008] [2021-07-09 17:10:23,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446978008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679654235] [2021-07-09 17:10:23,667 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:23,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:23,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:23,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679654235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:23,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493330502] [2021-07-09 17:10:23,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:23,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:23,855 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:24,151 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-07-09 17:10:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:24,152 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:10:24,152 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:10:24,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:10:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-07-09 17:10:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-07-09 17:10:24,154 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-07-09 17:10:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:24,154 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-07-09 17:10:24,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-07-09 17:10:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:24,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:24,155 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:24,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:10:24,369 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash -148837104, now seen corresponding path program 54 times [2021-07-09 17:10:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:24,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510962953] [2021-07-09 17:10:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:24,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:24,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510962953] [2021-07-09 17:10:24,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510962953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:24,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271818053] [2021-07-09 17:10:24,451 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:24,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:24,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:24,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271818053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:24,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:24,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:24,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529154614] [2021-07-09 17:10:24,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:24,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:24,615 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:24,846 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-07-09 17:10:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:24,847 INFO L225 Difference]: With dead ends: 155 [2021-07-09 17:10:24,847 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:10:24,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:10:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-07-09 17:10:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-07-09 17:10:24,849 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-07-09 17:10:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:24,849 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-07-09 17:10:24,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-07-09 17:10:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:24,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:24,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:25,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:25,050 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -133376308, now seen corresponding path program 55 times [2021-07-09 17:10:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:25,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757681145] [2021-07-09 17:10:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:25,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:25,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757681145] [2021-07-09 17:10:25,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757681145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199076312] [2021-07-09 17:10:25,138 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199076312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:25,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:25,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446217584] [2021-07-09 17:10:25,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:25,320 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:25,577 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-07-09 17:10:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:25,578 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:10:25,578 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:10:25,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:10:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-07-09 17:10:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-09 17:10:25,580 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-09 17:10:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:25,580 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-09 17:10:25,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-09 17:10:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:25,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:25,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:25,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:25,785 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 438078498, now seen corresponding path program 56 times [2021-07-09 17:10:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:25,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124241599] [2021-07-09 17:10:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:25,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:25,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124241599] [2021-07-09 17:10:25,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124241599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20171873] [2021-07-09 17:10:25,903 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:25,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:26,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20171873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:26,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:10:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031311584] [2021-07-09 17:10:26,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:26,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:26,063 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:26,290 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-07-09 17:10:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:10:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:26,291 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:10:26,291 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:10:26,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:10:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-07-09 17:10:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-09 17:10:26,293 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-09 17:10:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:26,293 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-09 17:10:26,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-09 17:10:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:26,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:26,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:26,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:26,518 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 984287384, now seen corresponding path program 57 times [2021-07-09 17:10:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:26,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529693094] [2021-07-09 17:10:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:26,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:26,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529693094] [2021-07-09 17:10:26,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529693094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410367020] [2021-07-09 17:10:26,597 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:26,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:26,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:26,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:26,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410367020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:26,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:26,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180703493] [2021-07-09 17:10:26,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:26,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:26,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:26,760 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:27,042 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-07-09 17:10:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:27,043 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:10:27,043 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:10:27,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:10:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-07-09 17:10:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-07-09 17:10:27,045 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-07-09 17:10:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:27,045 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-07-09 17:10:27,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-07-09 17:10:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:27,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:27,046 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:27,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:27,249 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash 601566996, now seen corresponding path program 58 times [2021-07-09 17:10:27,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:27,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875550686] [2021-07-09 17:10:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:27,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:27,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875550686] [2021-07-09 17:10:27,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875550686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:27,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925403818] [2021-07-09 17:10:27,323 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:27,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:27,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925403818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:27,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:27,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:27,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236476693] [2021-07-09 17:10:27,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:27,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:27,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:27,526 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:27,875 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-07-09 17:10:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:27,876 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:10:27,876 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:10:27,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:10:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-07-09 17:10:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-07-09 17:10:27,878 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-07-09 17:10:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:27,878 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-07-09 17:10:27,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-07-09 17:10:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:27,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:27,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:28,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:28,081 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1614106472, now seen corresponding path program 59 times [2021-07-09 17:10:28,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:28,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952931191] [2021-07-09 17:10:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:28,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:28,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952931191] [2021-07-09 17:10:28,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952931191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914818305] [2021-07-09 17:10:28,170 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:28,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:10:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:28,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914818305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:28,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601015853] [2021-07-09 17:10:28,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:28,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:28,345 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:28,841 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-07-09 17:10:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:10:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:28,842 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:10:28,842 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:10:28,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:10:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-07-09 17:10:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-07-09 17:10:28,844 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-07-09 17:10:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:28,844 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-07-09 17:10:28,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-07-09 17:10:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:28,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:28,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:29,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:10:29,061 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1598645676, now seen corresponding path program 60 times [2021-07-09 17:10:29,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:29,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768989817] [2021-07-09 17:10:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768989817] [2021-07-09 17:10:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768989817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216456048] [2021-07-09 17:10:29,139 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:29,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:29,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:29,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216456048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:29,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:29,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862107907] [2021-07-09 17:10:29,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:29,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:29,295 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:29,638 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-07-09 17:10:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:29,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:29,639 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:10:29,639 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 17:10:29,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 17:10:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-07-09 17:10:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-07-09 17:10:29,641 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-07-09 17:10:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:29,641 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-07-09 17:10:29,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-07-09 17:10:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:29,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:29,641 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:29,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:10:29,849 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1614259528, now seen corresponding path program 61 times [2021-07-09 17:10:29,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:29,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611310952] [2021-07-09 17:10:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611310952] [2021-07-09 17:10:29,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611310952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401561454] [2021-07-09 17:10:29,935 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:30,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401561454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:30,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:30,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594603828] [2021-07-09 17:10:30,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:30,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:30,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:30,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:30,156 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:30,396 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-07-09 17:10:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:30,397 INFO L225 Difference]: With dead ends: 130 [2021-07-09 17:10:30,397 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:10:30,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:10:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-07-09 17:10:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-07-09 17:10:30,399 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-07-09 17:10:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:30,399 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-07-09 17:10:30,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-07-09 17:10:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:30,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:30,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:30,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:30,600 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash -601413940, now seen corresponding path program 62 times [2021-07-09 17:10:30,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:30,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365486903] [2021-07-09 17:10:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:30,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365486903] [2021-07-09 17:10:30,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365486903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359198240] [2021-07-09 17:10:30,704 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:30,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359198240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:30,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761303831] [2021-07-09 17:10:30,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:30,917 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:31,281 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-07-09 17:10:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:10:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:31,282 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:10:31,282 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:10:31,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:10:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-07-09 17:10:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-09 17:10:31,284 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-07-09 17:10:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:31,284 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-09 17:10:31,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-09 17:10:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:31,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:31,285 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:31,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:10:31,497 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash -585953144, now seen corresponding path program 63 times [2021-07-09 17:10:31,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:31,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930677846] [2021-07-09 17:10:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:31,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:31,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930677846] [2021-07-09 17:10:31,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930677846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:31,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081132203] [2021-07-09 17:10:31,583 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:31,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:31,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081132203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:31,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:31,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:31,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498371333] [2021-07-09 17:10:31,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:31,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:31,771 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:32,044 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-07-09 17:10:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:32,045 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:10:32,045 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:10:32,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:10:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-07-09 17:10:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-07-09 17:10:32,048 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-07-09 17:10:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:32,048 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-07-09 17:10:32,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-07-09 17:10:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:32,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:32,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:32,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:10:32,251 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1544756820, now seen corresponding path program 64 times [2021-07-09 17:10:32,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:32,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589906851] [2021-07-09 17:10:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:32,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589906851] [2021-07-09 17:10:32,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589906851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970040456] [2021-07-09 17:10:32,340 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:32,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:32,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970040456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:32,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:32,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227583182] [2021-07-09 17:10:32,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:32,503 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:32,787 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-07-09 17:10:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:32,788 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:10:32,788 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:10:32,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:10:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-07-09 17:10:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-09 17:10:32,794 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-07-09 17:10:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:32,794 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-09 17:10:32,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-09 17:10:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:32,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:32,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:33,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-09 17:10:33,010 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1560217616, now seen corresponding path program 65 times [2021-07-09 17:10:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:33,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330116629] [2021-07-09 17:10:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:33,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:33,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330116629] [2021-07-09 17:10:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330116629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:33,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094808867] [2021-07-09 17:10:33,095 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:33,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:10:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094808867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:33,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:33,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610022504] [2021-07-09 17:10:33,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:33,266 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:33,580 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-07-09 17:10:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:33,581 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:10:33,581 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:10:33,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:10:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-07-09 17:10:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-07-09 17:10:33,584 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-07-09 17:10:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:33,584 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-07-09 17:10:33,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-07-09 17:10:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:33,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:33,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:33,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:33,793 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2131672422, now seen corresponding path program 66 times [2021-07-09 17:10:33,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:33,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484580334] [2021-07-09 17:10:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:33,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:33,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484580334] [2021-07-09 17:10:33,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484580334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:33,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558230042] [2021-07-09 17:10:33,883 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:33,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:34,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558230042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:34,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:34,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888641433] [2021-07-09 17:10:34,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:34,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:34,110 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:34,372 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-07-09 17:10:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:34,373 INFO L225 Difference]: With dead ends: 143 [2021-07-09 17:10:34,373 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:10:34,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:10:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-07-09 17:10:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-07-09 17:10:34,377 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-07-09 17:10:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:34,377 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-07-09 17:10:34,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-07-09 17:10:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:34,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:34,378 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:34,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:34,593 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1794909488, now seen corresponding path program 67 times [2021-07-09 17:10:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:34,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357432088] [2021-07-09 17:10:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:34,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:34,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357432088] [2021-07-09 17:10:34,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357432088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73544450] [2021-07-09 17:10:34,672 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:34,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73544450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:34,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545028388] [2021-07-09 17:10:34,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:34,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:34,859 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:34,993 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-07-09 17:10:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:34,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:34,993 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:10:34,993 INFO L226 Difference]: Without dead ends: 104 [2021-07-09 17:10:34,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-09 17:10:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-07-09 17:10:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-07-09 17:10:34,995 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-07-09 17:10:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:34,995 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-07-09 17:10:34,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-07-09 17:10:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:34,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:34,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:35,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:35,209 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 284384340, now seen corresponding path program 68 times [2021-07-09 17:10:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:35,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721953447] [2021-07-09 17:10:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:35,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:35,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721953447] [2021-07-09 17:10:35,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721953447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:35,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269538795] [2021-07-09 17:10:35,286 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:35,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:35,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:35,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:35,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269538795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:35,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:35,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310107793] [2021-07-09 17:10:35,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:35,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:35,463 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:35,788 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-07-09 17:10:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:35,789 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:10:35,789 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:10:35,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:10:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-07-09 17:10:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-07-09 17:10:35,791 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-07-09 17:10:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:35,791 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-07-09 17:10:35,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-07-09 17:10:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:35,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:35,791 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 17:10:36,012 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:36,012 INFO L82 PathProgramCache]: Analyzing trace with hash 299845136, now seen corresponding path program 69 times [2021-07-09 17:10:36,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:36,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935111537] [2021-07-09 17:10:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:36,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935111537] [2021-07-09 17:10:36,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935111537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048215347] [2021-07-09 17:10:36,099 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:36,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048215347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:36,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:36,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248617019] [2021-07-09 17:10:36,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:36,300 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:36,613 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-07-09 17:10:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:36,614 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:10:36,614 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:10:36,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:10:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-07-09 17:10:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-07-09 17:10:36,616 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-07-09 17:10:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:36,616 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-07-09 17:10:36,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-07-09 17:10:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:36,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:36,617 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:36,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,825 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1864412196, now seen corresponding path program 70 times [2021-07-09 17:10:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:36,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193051065] [2021-07-09 17:10:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:36,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193051065] [2021-07-09 17:10:36,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193051065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526910678] [2021-07-09 17:10:36,904 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526910678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:37,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676043869] [2021-07-09 17:10:37,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:37,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:37,086 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:37,336 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-07-09 17:10:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:37,337 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:10:37,337 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:10:37,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:10:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-07-09 17:10:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-07-09 17:10:37,339 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-07-09 17:10:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:37,339 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-07-09 17:10:37,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-07-09 17:10:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:37,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:37,339 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:37,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:37,540 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1848951400, now seen corresponding path program 71 times [2021-07-09 17:10:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:37,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400235930] [2021-07-09 17:10:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:37,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400235930] [2021-07-09 17:10:37,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400235930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892542665] [2021-07-09 17:10:37,628 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:37,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:10:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:37,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892542665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:37,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:37,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606114512] [2021-07-09 17:10:37,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:37,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:37,813 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:38,066 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-07-09 17:10:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:38,066 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:10:38,066 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:10:38,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:10:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-07-09 17:10:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-07-09 17:10:38,068 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-07-09 17:10:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:38,068 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-07-09 17:10:38,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-07-09 17:10:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:38,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:38,069 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:38,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:10:38,277 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1277496594, now seen corresponding path program 72 times [2021-07-09 17:10:38,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:38,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542732879] [2021-07-09 17:10:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:38,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:38,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542732879] [2021-07-09 17:10:38,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542732879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:38,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398854281] [2021-07-09 17:10:38,352 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:38,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398854281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:38,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:38,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496961302] [2021-07-09 17:10:38,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:38,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:38,532 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:38,764 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-07-09 17:10:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:38,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:38,765 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:10:38,765 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 17:10:38,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 17:10:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-07-09 17:10:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-07-09 17:10:38,767 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-07-09 17:10:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:38,767 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-07-09 17:10:38,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-07-09 17:10:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:38,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:38,767 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:38,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 17:10:38,968 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:38,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1336463512, now seen corresponding path program 73 times [2021-07-09 17:10:38,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:38,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129679172] [2021-07-09 17:10:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:39,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:39,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129679172] [2021-07-09 17:10:39,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129679172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996580312] [2021-07-09 17:10:39,054 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:39,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996580312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:39,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741507169] [2021-07-09 17:10:39,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:39,229 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:39,524 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-07-09 17:10:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:39,525 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:10:39,525 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:10:39,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:39,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:10:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-07-09 17:10:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-09 17:10:39,526 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-09 17:10:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:39,526 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-09 17:10:39,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-09 17:10:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:39,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:39,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:39,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,727 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1351924308, now seen corresponding path program 74 times [2021-07-09 17:10:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:39,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006204025] [2021-07-09 17:10:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:39,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:39,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006204025] [2021-07-09 17:10:39,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006204025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276852201] [2021-07-09 17:10:39,818 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:39,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276852201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:39,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946488055] [2021-07-09 17:10:39,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:39,993 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:40,365 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-07-09 17:10:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:40,366 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:10:40,366 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:10:40,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:10:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-07-09 17:10:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-07-09 17:10:40,368 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-07-09 17:10:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:40,368 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-07-09 17:10:40,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-07-09 17:10:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:40,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:40,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:40,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:40,581 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1923379114, now seen corresponding path program 75 times [2021-07-09 17:10:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:40,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110335250] [2021-07-09 17:10:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:40,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:40,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110335250] [2021-07-09 17:10:40,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110335250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:40,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402135816] [2021-07-09 17:10:40,655 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:40,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:40,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402135816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:40,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:40,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:40,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109479027] [2021-07-09 17:10:40,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:40,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:40,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:40,842 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:41,169 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-07-09 17:10:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:41,170 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:10:41,170 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:10:41,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:10:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-07-09 17:10:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-07-09 17:10:41,171 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-07-09 17:10:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:41,172 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-07-09 17:10:41,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-07-09 17:10:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:41,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:41,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:41,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:41,373 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:41,373 INFO L82 PathProgramCache]: Analyzing trace with hash 762400792, now seen corresponding path program 4 times [2021-07-09 17:10:41,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:41,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579146676] [2021-07-09 17:10:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:41,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579146676] [2021-07-09 17:10:41,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579146676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347539165] [2021-07-09 17:10:41,448 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:41,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:41,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:10:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347539165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:41,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:41,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:10:41,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155811542] [2021-07-09 17:10:41,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:41,545 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2021-07-09 17:10:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:41,709 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-07-09 17:10:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:10:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 17 [2021-07-09 17:10:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:41,710 INFO L225 Difference]: With dead ends: 130 [2021-07-09 17:10:41,710 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:10:41,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:10:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-07-09 17:10:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-07-09 17:10:41,711 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-07-09 17:10:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:41,711 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-07-09 17:10:41,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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) [2021-07-09 17:10:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-07-09 17:10:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:10:41,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:41,712 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:41,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:41,912 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1385523536, now seen corresponding path program 76 times [2021-07-09 17:10:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:41,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849932323] [2021-07-09 17:10:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:42,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:42,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849932323] [2021-07-09 17:10:42,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849932323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:42,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348247279] [2021-07-09 17:10:42,012 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:42,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:42,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:10:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:42,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348247279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:42,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:42,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:10:42,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282678428] [2021-07-09 17:10:42,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:42,216 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:42,608 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-07-09 17:10:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-07-09 17:10:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:42,609 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:10:42,609 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:10:42,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:10:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:10:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-07-09 17:10:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-07-09 17:10:42,613 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-07-09 17:10:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:42,613 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-07-09 17:10:42,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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) [2021-07-09 17:10:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-07-09 17:10:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:42,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:42,614 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:42,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:42,827 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash 255431194, now seen corresponding path program 4 times [2021-07-09 17:10:42,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:42,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126771638] [2021-07-09 17:10:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:42,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126771638] [2021-07-09 17:10:42,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126771638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756411574] [2021-07-09 17:10:42,915 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:42,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:10:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:43,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756411574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:43,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:10:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580274948] [2021-07-09 17:10:43,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:43,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:43,030 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-09 17:10:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:43,241 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-07-09 17:10:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:10:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 19 [2021-07-09 17:10:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:43,242 INFO L225 Difference]: With dead ends: 132 [2021-07-09 17:10:43,242 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:10:43,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:10:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-07-09 17:10:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-07-09 17:10:43,244 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-07-09 17:10:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:43,244 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-07-09 17:10:43,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-09 17:10:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-07-09 17:10:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:43,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:43,245 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:43,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 17:10:43,454 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2015204966, now seen corresponding path program 77 times [2021-07-09 17:10:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:43,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518743023] [2021-07-09 17:10:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:43,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:43,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518743023] [2021-07-09 17:10:43,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518743023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756316107] [2021-07-09 17:10:43,581 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:43,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:43,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:43,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756316107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:43,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402927538] [2021-07-09 17:10:43,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:43,815 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:44,138 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-07-09 17:10:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:44,139 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:10:44,139 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:10:44,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:10:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-07-09 17:10:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-07-09 17:10:44,141 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-07-09 17:10:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:44,141 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-07-09 17:10:44,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-07-09 17:10:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:44,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:44,141 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:44,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:44,342 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1897041942, now seen corresponding path program 78 times [2021-07-09 17:10:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:44,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436217023] [2021-07-09 17:10:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:44,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436217023] [2021-07-09 17:10:44,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436217023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159354897] [2021-07-09 17:10:44,449 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:44,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:44,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:44,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:44,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159354897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:44,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:44,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092157009] [2021-07-09 17:10:44,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:44,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:44,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:44,659 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:45,019 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-07-09 17:10:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:45,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:45,020 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:10:45,020 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:10:45,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:10:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-07-09 17:10:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-07-09 17:10:45,022 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-07-09 17:10:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:45,022 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-07-09 17:10:45,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-07-09 17:10:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:45,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:45,022 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:45,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 17:10:45,237 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:45,237 INFO L82 PathProgramCache]: Analyzing trace with hash -318631526, now seen corresponding path program 79 times [2021-07-09 17:10:45,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:45,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679579029] [2021-07-09 17:10:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:45,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:45,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679579029] [2021-07-09 17:10:45,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679579029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:45,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236255307] [2021-07-09 17:10:45,344 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:45,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:45,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236255307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:45,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:45,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:45,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491326238] [2021-07-09 17:10:45,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:45,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:45,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:45,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:45,575 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:45,918 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-07-09 17:10:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:45,919 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:10:45,919 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:10:45,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:10:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-07-09 17:10:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-07-09 17:10:45,920 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-07-09 17:10:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:45,921 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-07-09 17:10:45,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-07-09 17:10:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:45,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:45,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:46,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 17:10:46,121 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash -303170730, now seen corresponding path program 80 times [2021-07-09 17:10:46,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:46,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60456778] [2021-07-09 17:10:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:46,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:46,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60456778] [2021-07-09 17:10:46,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60456778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:46,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901279454] [2021-07-09 17:10:46,225 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:46,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:46,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:46,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901279454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:46,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:46,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543416444] [2021-07-09 17:10:46,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:46,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:46,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:46,499 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:46,878 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-07-09 17:10:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:46,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:46,879 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:10:46,879 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:10:46,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:10:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-07-09 17:10:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-07-09 17:10:46,881 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-07-09 17:10:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:46,881 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-07-09 17:10:46,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-07-09 17:10:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:46,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:46,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:47,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:47,082 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1454735530, now seen corresponding path program 81 times [2021-07-09 17:10:47,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:47,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229328604] [2021-07-09 17:10:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:47,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229328604] [2021-07-09 17:10:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229328604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212228259] [2021-07-09 17:10:47,178 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:47,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:47,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212228259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:47,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:47,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200519669] [2021-07-09 17:10:47,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:47,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:47,379 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:47,707 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-07-09 17:10:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:47,708 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:10:47,708 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:10:47,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:10:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-07-09 17:10:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-07-09 17:10:47,710 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-07-09 17:10:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:47,710 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-07-09 17:10:47,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-07-09 17:10:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:47,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:47,711 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:47,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:47,925 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1439274734, now seen corresponding path program 82 times [2021-07-09 17:10:47,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:47,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474924257] [2021-07-09 17:10:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:48,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474924257] [2021-07-09 17:10:48,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474924257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912651200] [2021-07-09 17:10:48,019 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:48,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:48,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:48,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:48,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:48,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912651200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:48,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:48,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:48,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118413930] [2021-07-09 17:10:48,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:48,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:48,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:48,216 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:48,530 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-07-09 17:10:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:48,531 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:10:48,531 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:10:48,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:10:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-07-09 17:10:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-07-09 17:10:48,533 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-07-09 17:10:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:48,533 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-07-09 17:10:48,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-07-09 17:10:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:48,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:48,533 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:48,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:48,734 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash -867819928, now seen corresponding path program 83 times [2021-07-09 17:10:48,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:48,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340452586] [2021-07-09 17:10:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:48,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:48,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340452586] [2021-07-09 17:10:48,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340452586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:48,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767267138] [2021-07-09 17:10:48,840 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:48,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:48,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:48,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:49,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767267138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:49,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:49,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426145804] [2021-07-09 17:10:49,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:49,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:49,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:49,098 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:49,313 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-07-09 17:10:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:49,314 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:10:49,314 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:10:49,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:10:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-07-09 17:10:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-07-09 17:10:49,316 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-07-09 17:10:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:49,316 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-07-09 17:10:49,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-07-09 17:10:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:49,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:49,317 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:49,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:49,539 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:49,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2041798938, now seen corresponding path program 84 times [2021-07-09 17:10:49,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:49,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839399225] [2021-07-09 17:10:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:49,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:49,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839399225] [2021-07-09 17:10:49,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839399225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002107759] [2021-07-09 17:10:49,638 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:49,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:10:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:10:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002107759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:49,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831468097] [2021-07-09 17:10:49,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:49,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:49,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:49,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:49,901 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:50,067 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-07-09 17:10:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:50,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:50,068 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:10:50,068 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:10:50,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:10:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-07-09 17:10:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-07-09 17:10:50,070 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-07-09 17:10:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:50,070 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-07-09 17:10:50,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-07-09 17:10:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:50,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:50,071 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:50,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:50,281 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -499434542, now seen corresponding path program 85 times [2021-07-09 17:10:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:50,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944675202] [2021-07-09 17:10:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:50,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944675202] [2021-07-09 17:10:50,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944675202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:50,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964449241] [2021-07-09 17:10:50,377 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:50,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964449241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:50,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:50,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:50,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186290708] [2021-07-09 17:10:50,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:50,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:50,590 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:50,971 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-07-09 17:10:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:50,972 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:10:50,972 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:10:50,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:10:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:10:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-07-09 17:10:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-07-09 17:10:50,974 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-07-09 17:10:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:50,974 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-07-09 17:10:50,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-07-09 17:10:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:50,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:50,974 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:51,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,181 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859286, now seen corresponding path program 86 times [2021-07-09 17:10:51,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:51,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367212734] [2021-07-09 17:10:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:51,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:51,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367212734] [2021-07-09 17:10:51,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367212734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117679739] [2021-07-09 17:10:51,279 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:51,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:51,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:51,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117679739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:51,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:51,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883892868] [2021-07-09 17:10:51,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:51,494 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:51,944 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-07-09 17:10:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:51,945 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:10:51,945 INFO L226 Difference]: Without dead ends: 185 [2021-07-09 17:10:51,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-09 17:10:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-07-09 17:10:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-07-09 17:10:51,947 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-07-09 17:10:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:51,947 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-07-09 17:10:51,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-07-09 17:10:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:51,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:51,948 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:52,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:52,161 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:52,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1595320082, now seen corresponding path program 87 times [2021-07-09 17:10:52,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:52,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654873977] [2021-07-09 17:10:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:52,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:52,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654873977] [2021-07-09 17:10:52,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654873977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:52,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615620367] [2021-07-09 17:10:52,255 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:52,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:52,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:52,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:52,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615620367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:52,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:52,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:52,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716837565] [2021-07-09 17:10:52,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:52,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:52,481 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:52,964 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-07-09 17:10:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:52,965 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:10:52,965 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:10:52,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:10:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-07-09 17:10:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-07-09 17:10:52,968 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-07-09 17:10:52,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:52,968 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-07-09 17:10:52,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-07-09 17:10:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:52,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:52,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:53,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:53,173 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash -568937250, now seen corresponding path program 88 times [2021-07-09 17:10:53,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:53,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643290146] [2021-07-09 17:10:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:53,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:53,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643290146] [2021-07-09 17:10:53,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643290146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:53,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848010205] [2021-07-09 17:10:53,284 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:53,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:53,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:53,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848010205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:53,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:53,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:53,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630477555] [2021-07-09 17:10:53,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:53,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:53,534 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:54,068 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-07-09 17:10:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:10:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:54,069 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:10:54,069 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:10:54,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:10:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:10:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-07-09 17:10:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-07-09 17:10:54,071 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-07-09 17:10:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:54,071 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-07-09 17:10:54,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-07-09 17:10:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:54,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:54,072 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:54,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 17:10:54,285 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:54,285 INFO L82 PathProgramCache]: Analyzing trace with hash -553476454, now seen corresponding path program 89 times [2021-07-09 17:10:54,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:54,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860712868] [2021-07-09 17:10:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:54,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:54,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860712868] [2021-07-09 17:10:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860712868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388747046] [2021-07-09 17:10:54,382 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:54,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:54,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:54,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:54,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:54,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388747046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:54,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:54,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322214526] [2021-07-09 17:10:54,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:54,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:54,598 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:55,092 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-07-09 17:10:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:10:55,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:55,093 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:10:55,093 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:10:55,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:10:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:10:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-07-09 17:10:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-07-09 17:10:55,095 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-07-09 17:10:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:55,095 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-07-09 17:10:55,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-07-09 17:10:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:55,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:55,095 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:55,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:55,296 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash 17978352, now seen corresponding path program 90 times [2021-07-09 17:10:55,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:55,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004470738] [2021-07-09 17:10:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:55,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004470738] [2021-07-09 17:10:55,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004470738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:55,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841417866] [2021-07-09 17:10:55,409 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:55,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:55,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:55,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:55,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841417866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:55,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:55,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:55,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187939397] [2021-07-09 17:10:55,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:55,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:55,678 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:56,212 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-07-09 17:10:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:10:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:56,213 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:10:56,213 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:10:56,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:10:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:10:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-07-09 17:10:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-07-09 17:10:56,216 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-07-09 17:10:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:56,216 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-07-09 17:10:56,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-07-09 17:10:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:56,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:56,216 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:56,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:56,425 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:56,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1663028838, now seen corresponding path program 91 times [2021-07-09 17:10:56,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:56,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108736027] [2021-07-09 17:10:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:56,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108736027] [2021-07-09 17:10:56,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108736027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074144531] [2021-07-09 17:10:56,516 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:56,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:56,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074144531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:56,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:56,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:56,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703968107] [2021-07-09 17:10:56,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:56,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:56,721 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:57,283 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-07-09 17:10:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:10:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:57,285 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:10:57,286 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:10:57,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:10:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:10:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-07-09 17:10:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-09 17:10:57,288 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-09 17:10:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:57,288 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-09 17:10:57,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-09 17:10:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:57,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:57,289 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:57,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:10:57,497 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1647568042, now seen corresponding path program 92 times [2021-07-09 17:10:57,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:57,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002635829] [2021-07-09 17:10:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:57,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:57,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002635829] [2021-07-09 17:10:57,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002635829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359589772] [2021-07-09 17:10:57,591 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:57,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:57,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359589772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:57,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078873337] [2021-07-09 17:10:57,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:57,788 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:58,376 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-07-09 17:10:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:58,377 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:10:58,377 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:10:58,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 487.9ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:10:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-07-09 17:10:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-07-09 17:10:58,380 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-07-09 17:10:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:58,380 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-07-09 17:10:58,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-07-09 17:10:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:58,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:58,381 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:58,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 17:10:58,585 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:58,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1076113236, now seen corresponding path program 93 times [2021-07-09 17:10:58,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:58,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879771314] [2021-07-09 17:10:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:58,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879771314] [2021-07-09 17:10:58,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879771314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316758519] [2021-07-09 17:10:58,676 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:58,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:58,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:58,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:10:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:58,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316758519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:58,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:58,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:10:58,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838637633] [2021-07-09 17:10:58,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:10:58,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:10:58,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:58,915 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:59,495 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-07-09 17:10:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:10:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:10:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:59,496 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:10:59,496 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:10:59,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:59,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:10:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-07-09 17:10:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-09 17:10:59,498 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-09 17:10:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:59,498 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-09 17:10:59,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:10:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-09 17:10:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:10:59,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:59,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:59,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:10:59,701 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash 361302298, now seen corresponding path program 94 times [2021-07-09 17:10:59,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:59,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936412059] [2021-07-09 17:10:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:59,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936412059] [2021-07-09 17:10:59,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936412059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:59,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017640033] [2021-07-09 17:10:59,817 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:59,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:59,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:59,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:10:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017640033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:00,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:00,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697992804] [2021-07-09 17:11:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:00,119 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:00,413 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-07-09 17:11:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:00,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:00,413 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:11:00,413 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:11:00,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:11:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-07-09 17:11:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-09 17:11:00,416 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-09 17:11:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:00,416 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-09 17:11:00,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-09 17:11:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:00,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:00,416 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:00,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:11:00,617 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:00,617 INFO L82 PathProgramCache]: Analyzing trace with hash -21418090, now seen corresponding path program 95 times [2021-07-09 17:11:00,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:00,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547484875] [2021-07-09 17:11:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:00,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547484875] [2021-07-09 17:11:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547484875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656215367] [2021-07-09 17:11:00,723 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:00,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:11:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:00,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656215367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:00,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:00,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737562648] [2021-07-09 17:11:00,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:00,987 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:01,268 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-07-09 17:11:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:01,268 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:11:01,269 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:11:01,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:11:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-07-09 17:11:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-07-09 17:11:01,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-07-09 17:11:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:01,270 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-07-09 17:11:01,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-07-09 17:11:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:01,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:01,271 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:01,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:11:01,485 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2057875738, now seen corresponding path program 96 times [2021-07-09 17:11:01,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:01,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008271116] [2021-07-09 17:11:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:01,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008271116] [2021-07-09 17:11:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008271116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428481642] [2021-07-09 17:11:01,582 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:01,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:11:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:01,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:01,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428481642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:01,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:01,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:01,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532924786] [2021-07-09 17:11:01,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:01,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:01,827 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:02,078 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-07-09 17:11:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:11:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:02,079 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:11:02,079 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:11:02,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:11:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-07-09 17:11:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-09 17:11:02,081 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-09 17:11:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:02,081 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-09 17:11:02,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-09 17:11:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:02,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:02,081 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:02,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 17:11:02,289 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2073336534, now seen corresponding path program 97 times [2021-07-09 17:11:02,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:02,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989392363] [2021-07-09 17:11:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:02,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989392363] [2021-07-09 17:11:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989392363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440606281] [2021-07-09 17:11:02,396 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:02,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:02,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440606281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:02,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:02,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199209724] [2021-07-09 17:11:02,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:02,683 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:03,012 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-07-09 17:11:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:11:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:03,016 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:11:03,016 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:11:03,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:11:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-07-09 17:11:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-09 17:11:03,021 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-09 17:11:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:03,021 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-09 17:11:03,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-09 17:11:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:03,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:03,022 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:03,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 17:11:03,234 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1613968814, now seen corresponding path program 98 times [2021-07-09 17:11:03,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:03,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097062421] [2021-07-09 17:11:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:03,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:03,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097062421] [2021-07-09 17:11:03,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097062421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:03,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548207117] [2021-07-09 17:11:03,325 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:03,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:03,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:03,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:03,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548207117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:03,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:03,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:03,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026621511] [2021-07-09 17:11:03,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:03,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:03,551 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:03,947 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-07-09 17:11:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:11:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:03,948 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:11:03,948 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:11:03,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:11:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:11:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-07-09 17:11:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-07-09 17:11:03,950 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-07-09 17:11:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:03,950 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-07-09 17:11:03,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-07-09 17:11:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:03,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:03,950 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:04,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:04,153 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:04,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683798, now seen corresponding path program 99 times [2021-07-09 17:11:04,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:04,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935595047] [2021-07-09 17:11:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:04,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:04,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935595047] [2021-07-09 17:11:04,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935595047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085943069] [2021-07-09 17:11:04,246 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:04,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:04,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:04,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:04,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:04,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085943069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:04,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534034270] [2021-07-09 17:11:04,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:04,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:04,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:04,442 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:05,416 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-07-09 17:11:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:11:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:05,417 INFO L225 Difference]: With dead ends: 286 [2021-07-09 17:11:05,417 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 17:11:05,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:11:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 17:11:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-07-09 17:11:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-07-09 17:11:05,421 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-07-09 17:11:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:05,421 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-07-09 17:11:05,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-07-09 17:11:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:05,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:05,421 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:05,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 17:11:05,645 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1773144594, now seen corresponding path program 100 times [2021-07-09 17:11:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:05,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184163300] [2021-07-09 17:11:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:05,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184163300] [2021-07-09 17:11:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184163300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114505334] [2021-07-09 17:11:05,748 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:05,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:05,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:05,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114505334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:05,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:05,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:05,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909261680] [2021-07-09 17:11:05,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:05,983 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:07,103 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-07-09 17:11:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:11:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:07,103 INFO L225 Difference]: With dead ends: 295 [2021-07-09 17:11:07,103 INFO L226 Difference]: Without dead ends: 288 [2021-07-09 17:11:07,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 899.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:11:07,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-09 17:11:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-07-09 17:11:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-09 17:11:07,106 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-09 17:11:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:07,106 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-09 17:11:07,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-09 17:11:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:07,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:07,106 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:07,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:07,307 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:07,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1950367896, now seen corresponding path program 101 times [2021-07-09 17:11:07,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:07,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874415894] [2021-07-09 17:11:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:07,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874415894] [2021-07-09 17:11:07,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874415894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309343556] [2021-07-09 17:11:07,409 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:07,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:07,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:07,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309343556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:07,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:07,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353060123] [2021-07-09 17:11:07,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:07,629 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:08,464 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-07-09 17:11:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:11:08,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:08,465 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:11:08,465 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:11:08,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:11:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:11:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-07-09 17:11:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-09 17:11:08,467 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-09 17:11:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:08,467 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-09 17:11:08,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-09 17:11:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:08,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:08,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:08,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-09 17:11:08,668 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash -512952362, now seen corresponding path program 102 times [2021-07-09 17:11:08,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:08,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327403580] [2021-07-09 17:11:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:08,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:08,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327403580] [2021-07-09 17:11:08,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327403580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:08,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757212828] [2021-07-09 17:11:08,761 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:08,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:11:08,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:08,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:09,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757212828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:09,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:09,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:09,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860753304] [2021-07-09 17:11:09,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:09,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:09,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:09,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:09,009 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:09,247 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-07-09 17:11:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:09,248 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:11:09,248 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:11:09,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:11:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-07-09 17:11:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-07-09 17:11:09,250 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-07-09 17:11:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:09,250 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-07-09 17:11:09,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-07-09 17:11:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:09,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:09,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:09,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:09,461 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash -895672750, now seen corresponding path program 103 times [2021-07-09 17:11:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:09,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063529084] [2021-07-09 17:11:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:09,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:09,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063529084] [2021-07-09 17:11:09,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063529084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:09,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347394166] [2021-07-09 17:11:09,550 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:09,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347394166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:09,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:09,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471913208] [2021-07-09 17:11:09,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:09,791 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:10,015 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-07-09 17:11:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:10,016 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:11:10,016 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:11:10,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:11:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-07-09 17:11:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-09 17:11:10,018 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-09 17:11:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:10,018 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-09 17:11:10,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-09 17:11:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:10,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:10,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:10,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 17:11:10,219 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1183621078, now seen corresponding path program 104 times [2021-07-09 17:11:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:10,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972049444] [2021-07-09 17:11:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:10,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:10,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972049444] [2021-07-09 17:11:10,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972049444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:10,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168002230] [2021-07-09 17:11:10,313 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:10,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:10,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:10,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168002230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:10,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:10,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:10,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92412321] [2021-07-09 17:11:10,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:10,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:10,569 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:10,856 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-07-09 17:11:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:11:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:10,857 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:11:10,857 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:11:10,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:11:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-07-09 17:11:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-07-09 17:11:10,858 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-07-09 17:11:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:10,859 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-07-09 17:11:10,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-07-09 17:11:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:10,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:10,859 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:11,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:11:11,061 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1199081874, now seen corresponding path program 105 times [2021-07-09 17:11:11,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:11,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530413978] [2021-07-09 17:11:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:11,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530413978] [2021-07-09 17:11:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530413978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658551752] [2021-07-09 17:11:11,153 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:11,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:11:11,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:11,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:11,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:11,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658551752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:11,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:11,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549759607] [2021-07-09 17:11:11,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:11,380 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:11,719 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-07-09 17:11:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:11:11,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:11,720 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:11:11,720 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:11:11,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:11:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:11:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-07-09 17:11:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-07-09 17:11:11,722 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-07-09 17:11:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:11,722 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-07-09 17:11:11,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-07-09 17:11:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:11,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:11,722 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:11,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 17:11:11,923 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1806743822, now seen corresponding path program 106 times [2021-07-09 17:11:11,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:11,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120381231] [2021-07-09 17:11:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:12,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:12,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120381231] [2021-07-09 17:11:12,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120381231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363080340] [2021-07-09 17:11:12,022 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:11:12,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:12,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:12,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:12,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363080340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:12,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:12,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809153243] [2021-07-09 17:11:12,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:12,287 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:13,050 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-07-09 17:11:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:11:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:13,051 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:11:13,051 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:11:13,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 777.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:11:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:11:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-07-09 17:11:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-07-09 17:11:13,053 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-07-09 17:11:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:13,053 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-07-09 17:11:13,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-07-09 17:11:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:13,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:13,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:13,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:13,254 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash 117019782, now seen corresponding path program 107 times [2021-07-09 17:11:13,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:13,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164196056] [2021-07-09 17:11:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:13,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:13,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164196056] [2021-07-09 17:11:13,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164196056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:13,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55528698] [2021-07-09 17:11:13,350 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:13,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:13,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55528698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:13,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:13,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278309655] [2021-07-09 17:11:13,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:13,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:13,591 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:13,780 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-07-09 17:11:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:13,781 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:11:13,781 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:11:13,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:11:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-07-09 17:11:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:13,783 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:13,783 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:13,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:13,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:13,783 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:13,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 17:11:13,984 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2098653686, now seen corresponding path program 108 times [2021-07-09 17:11:13,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:13,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887439655] [2021-07-09 17:11:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:14,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:14,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887439655] [2021-07-09 17:11:14,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887439655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:14,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348000843] [2021-07-09 17:11:14,096 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:14,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:14,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:14,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348000843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:14,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:14,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:14,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556534911] [2021-07-09 17:11:14,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:14,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:14,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:14,328 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:14,594 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-07-09 17:11:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:11:14,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:14,594 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:11:14,594 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:11:14,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:11:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-07-09 17:11:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-07-09 17:11:14,596 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-07-09 17:11:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:14,596 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-07-09 17:11:14,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-07-09 17:11:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:14,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:14,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:14,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:14,797 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2083192890, now seen corresponding path program 109 times [2021-07-09 17:11:14,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:14,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813966188] [2021-07-09 17:11:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:14,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:14,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813966188] [2021-07-09 17:11:14,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813966188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:14,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889835723] [2021-07-09 17:11:14,887 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:14,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:15,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889835723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:15,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:15,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938729090] [2021-07-09 17:11:15,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:15,137 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:15,436 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-07-09 17:11:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:11:15,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:15,436 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:11:15,436 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:11:15,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:11:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-07-09 17:11:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-07-09 17:11:15,438 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-07-09 17:11:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:15,438 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-07-09 17:11:15,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-07-09 17:11:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:15,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:15,438 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:15,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:15,653 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash 47517074, now seen corresponding path program 110 times [2021-07-09 17:11:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:15,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131050821] [2021-07-09 17:11:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:15,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131050821] [2021-07-09 17:11:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131050821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538795996] [2021-07-09 17:11:15,745 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:15,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:16,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538795996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:16,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:16,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:16,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514477097] [2021-07-09 17:11:16,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:16,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:16,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:16,012 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:16,257 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-07-09 17:11:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:16,258 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:11:16,258 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:11:16,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:11:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-07-09 17:11:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-07-09 17:11:16,260 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-07-09 17:11:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:16,260 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-07-09 17:11:16,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-07-09 17:11:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:16,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:16,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:16,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 17:11:16,465 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 62977870, now seen corresponding path program 111 times [2021-07-09 17:11:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:16,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607966291] [2021-07-09 17:11:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:16,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607966291] [2021-07-09 17:11:16,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607966291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549781016] [2021-07-09 17:11:16,576 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:16,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:16,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549781016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:16,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:16,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627573699] [2021-07-09 17:11:16,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:16,805 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:16,994 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-07-09 17:11:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:16,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:16,994 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:11:16,994 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:11:16,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:11:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-07-09 17:11:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:16,996 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:16,996 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:16,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:16,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:16,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:17,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:17,197 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash 634432676, now seen corresponding path program 112 times [2021-07-09 17:11:17,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:17,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221671619] [2021-07-09 17:11:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:17,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221671619] [2021-07-09 17:11:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221671619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438743283] [2021-07-09 17:11:17,284 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:17,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:17,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:17,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:17,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438743283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:17,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:17,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:17,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595765570] [2021-07-09 17:11:17,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:17,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:17,529 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:17,732 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-07-09 17:11:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:17,732 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:11:17,732 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:11:17,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:11:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-07-09 17:11:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:17,734 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:17,734 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:17,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:17,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:17,734 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:17,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:17,935 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1180641562, now seen corresponding path program 113 times [2021-07-09 17:11:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:17,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125275358] [2021-07-09 17:11:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:18,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:18,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125275358] [2021-07-09 17:11:18,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125275358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:18,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585553037] [2021-07-09 17:11:18,021 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:18,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:11:18,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:18,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585553037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:18,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:18,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:18,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64892133] [2021-07-09 17:11:18,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:18,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:18,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:18,309 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:18,533 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-07-09 17:11:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:18,534 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:11:18,534 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:11:18,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:11:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-07-09 17:11:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:18,536 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:18,536 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:18,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:18,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:18,536 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:18,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:18,737 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash 797921174, now seen corresponding path program 114 times [2021-07-09 17:11:18,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:18,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088761270] [2021-07-09 17:11:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:18,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:18,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088761270] [2021-07-09 17:11:18,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088761270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:18,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259642094] [2021-07-09 17:11:18,832 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:18,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:11:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:19,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259642094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:19,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:19,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:19,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677831477] [2021-07-09 17:11:19,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:19,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:19,082 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:19,279 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-07-09 17:11:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:19,280 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:11:19,280 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:11:19,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:11:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-07-09 17:11:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-09 17:11:19,282 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-09 17:11:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:19,282 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-09 17:11:19,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-09 17:11:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:19,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:19,282 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:19,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:19,483 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1417752294, now seen corresponding path program 115 times [2021-07-09 17:11:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:19,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52873089] [2021-07-09 17:11:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:19,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:19,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52873089] [2021-07-09 17:11:19,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52873089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:19,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199835785] [2021-07-09 17:11:19,588 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:19,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199835785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:19,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:19,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:19,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882781371] [2021-07-09 17:11:19,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:19,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:19,820 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:20,090 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-07-09 17:11:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:20,091 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:11:20,091 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:11:20,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:11:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-07-09 17:11:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:20,092 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:20,092 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:20,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:20,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:20,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:20,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 17:11:20,293 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1402291498, now seen corresponding path program 116 times [2021-07-09 17:11:20,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:20,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516484266] [2021-07-09 17:11:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:20,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:20,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516484266] [2021-07-09 17:11:20,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516484266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934527255] [2021-07-09 17:11:20,385 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:20,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:20,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:20,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:20,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:20,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934527255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:20,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:20,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521397568] [2021-07-09 17:11:20,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:20,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:20,617 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:20,945 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-07-09 17:11:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:20,946 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:11:20,946 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:11:20,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:11:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-07-09 17:11:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-07-09 17:11:20,947 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-07-09 17:11:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:20,947 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-07-09 17:11:20,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-07-09 17:11:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:20,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:20,948 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:21,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:11:21,148 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1810613706, now seen corresponding path program 117 times [2021-07-09 17:11:21,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:21,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625103434] [2021-07-09 17:11:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:21,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:21,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625103434] [2021-07-09 17:11:21,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625103434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:21,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088133944] [2021-07-09 17:11:21,234 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:21,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:21,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:21,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088133944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:21,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:21,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:21,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495977861] [2021-07-09 17:11:21,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:21,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:21,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:21,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:21,470 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:21,677 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-07-09 17:11:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:21,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:21,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:21,678 INFO L225 Difference]: With dead ends: 130 [2021-07-09 17:11:21,678 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:11:21,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:11:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-07-09 17:11:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-07-09 17:11:21,679 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-07-09 17:11:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:21,679 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-07-09 17:11:21,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-07-09 17:11:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:21,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:21,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:21,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:11:21,880 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -405059762, now seen corresponding path program 118 times [2021-07-09 17:11:21,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:21,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671702490] [2021-07-09 17:11:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:21,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671702490] [2021-07-09 17:11:21,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671702490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238310440] [2021-07-09 17:11:21,971 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:21,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:21,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:21,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238310440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:22,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:22,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:22,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963375316] [2021-07-09 17:11:22,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:22,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:22,209 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:22,446 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-07-09 17:11:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:22,446 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:11:22,446 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:11:22,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:11:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-07-09 17:11:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-07-09 17:11:22,448 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-07-09 17:11:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:22,448 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-07-09 17:11:22,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-07-09 17:11:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:22,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:22,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:22,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:22,653 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash -389598966, now seen corresponding path program 119 times [2021-07-09 17:11:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:22,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51570965] [2021-07-09 17:11:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:22,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51570965] [2021-07-09 17:11:22,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51570965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155242052] [2021-07-09 17:11:22,743 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:22,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:23,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155242052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:23,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:23,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822964470] [2021-07-09 17:11:23,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:23,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:23,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:23,006 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:23,241 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-07-09 17:11:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:23,241 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:11:23,241 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:11:23,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:11:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-09 17:11:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-07-09 17:11:23,244 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-07-09 17:11:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:23,244 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-07-09 17:11:23,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-07-09 17:11:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:23,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:23,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:23,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 17:11:23,457 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1741110998, now seen corresponding path program 120 times [2021-07-09 17:11:23,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:23,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426377402] [2021-07-09 17:11:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:23,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426377402] [2021-07-09 17:11:23,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426377402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958406867] [2021-07-09 17:11:23,574 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:23,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958406867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:23,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:23,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182416994] [2021-07-09 17:11:23,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:23,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:23,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:23,830 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:24,108 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-07-09 17:11:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:24,109 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:11:24,109 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:11:24,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:11:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-07-09 17:11:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-07-09 17:11:24,111 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-07-09 17:11:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:24,111 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-07-09 17:11:24,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-07-09 17:11:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:24,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:24,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:24,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:11:24,325 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1756571794, now seen corresponding path program 121 times [2021-07-09 17:11:24,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:24,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013273879] [2021-07-09 17:11:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:24,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:24,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013273879] [2021-07-09 17:11:24,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013273879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:24,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004308226] [2021-07-09 17:11:24,436 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:24,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004308226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:24,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:24,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:24,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605514083] [2021-07-09 17:11:24,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:24,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:24,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:24,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:24,721 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:25,016 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-07-09 17:11:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:25,017 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:11:25,017 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:11:25,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:11:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-07-09 17:11:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-07-09 17:11:25,019 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-07-09 17:11:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:25,019 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-07-09 17:11:25,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-07-09 17:11:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:25,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:25,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:25,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:11:25,220 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:25,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1966940696, now seen corresponding path program 122 times [2021-07-09 17:11:25,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:25,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240591037] [2021-07-09 17:11:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:25,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240591037] [2021-07-09 17:11:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240591037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761398749] [2021-07-09 17:11:25,309 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:25,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:25,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:25,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761398749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:25,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:25,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:25,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321054990] [2021-07-09 17:11:25,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:25,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:25,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:25,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:25,556 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:25,752 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-07-09 17:11:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:25,753 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:11:25,753 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:11:25,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:11:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-07-09 17:11:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-07-09 17:11:25,755 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-07-09 17:11:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:25,755 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-07-09 17:11:25,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-07-09 17:11:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:25,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:25,755 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:25,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:25,956 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1598555310, now seen corresponding path program 123 times [2021-07-09 17:11:25,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:25,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600028815] [2021-07-09 17:11:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:26,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:26,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600028815] [2021-07-09 17:11:26,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600028815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356904606] [2021-07-09 17:11:26,042 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:26,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:26,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:26,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356904606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:26,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:26,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356200855] [2021-07-09 17:11:26,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:26,287 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:26,518 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-07-09 17:11:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:26,519 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:11:26,519 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:11:26,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:11:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-07-09 17:11:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-09 17:11:26,521 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-09 17:11:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:26,521 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-09 17:11:26,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-09 17:11:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:26,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:26,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:26,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:26,722 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 480738518, now seen corresponding path program 124 times [2021-07-09 17:11:26,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:26,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49911093] [2021-07-09 17:11:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:26,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:26,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49911093] [2021-07-09 17:11:26,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49911093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118366034] [2021-07-09 17:11:26,809 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:26,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:27,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118366034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:27,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:27,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:27,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563735099] [2021-07-09 17:11:27,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:27,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:27,046 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:27,306 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-07-09 17:11:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:27,307 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:11:27,307 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:11:27,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:11:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-07-09 17:11:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:27,308 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:27,309 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:27,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:27,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:27,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:27,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-09 17:11:27,510 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash 496199314, now seen corresponding path program 125 times [2021-07-09 17:11:27,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:27,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978063620] [2021-07-09 17:11:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:27,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:27,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978063620] [2021-07-09 17:11:27,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978063620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:27,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501871178] [2021-07-09 17:11:27,598 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:27,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:27,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501871178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:27,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:27,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:27,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697812060] [2021-07-09 17:11:27,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:27,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:27,837 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:28,150 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-07-09 17:11:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:28,151 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:11:28,152 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:11:28,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:11:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-07-09 17:11:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:28,154 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:28,154 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:28,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:28,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:28,154 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:28,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:11:28,369 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1668058018, now seen corresponding path program 126 times [2021-07-09 17:11:28,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:28,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338206227] [2021-07-09 17:11:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:28,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338206227] [2021-07-09 17:11:28,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338206227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857789123] [2021-07-09 17:11:28,460 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:28,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:28,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:28,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857789123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:28,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:28,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:28,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741501861] [2021-07-09 17:11:28,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:28,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:28,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:28,695 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:28,953 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-07-09 17:11:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:28,953 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:11:28,953 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:11:28,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:11:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-07-09 17:11:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:28,955 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:28,955 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:28,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:28,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:28,955 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:29,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:11:29,156 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:29,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1652597222, now seen corresponding path program 127 times [2021-07-09 17:11:29,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:29,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983523550] [2021-07-09 17:11:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:29,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983523550] [2021-07-09 17:11:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983523550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013983403] [2021-07-09 17:11:29,244 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:29,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013983403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:29,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:29,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924587330] [2021-07-09 17:11:29,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:29,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:29,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:29,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:29,473 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:29,717 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-07-09 17:11:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:29,718 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:11:29,718 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:11:29,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:11:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-07-09 17:11:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-09 17:11:29,720 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-09 17:11:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:29,720 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-09 17:11:29,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-09 17:11:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:29,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:29,721 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:29,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 17:11:29,925 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1081142416, now seen corresponding path program 128 times [2021-07-09 17:11:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:29,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584590627] [2021-07-09 17:11:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:30,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:30,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584590627] [2021-07-09 17:11:30,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584590627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202066202] [2021-07-09 17:11:30,007 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:30,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:30,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:30,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:30,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202066202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:30,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409567450] [2021-07-09 17:11:30,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:30,240 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:30,427 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-07-09 17:11:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:30,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:30,427 INFO L225 Difference]: With dead ends: 131 [2021-07-09 17:11:30,428 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 17:11:30,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 17:11:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-07-09 17:11:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-07-09 17:11:30,429 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-07-09 17:11:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:30,429 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-07-09 17:11:30,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-07-09 17:11:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:30,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:30,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:30,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:11:30,630 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1532817690, now seen corresponding path program 129 times [2021-07-09 17:11:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:30,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370080933] [2021-07-09 17:11:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:30,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:30,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370080933] [2021-07-09 17:11:30,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370080933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854934421] [2021-07-09 17:11:30,720 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:30,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:30,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854934421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:30,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:30,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035143323] [2021-07-09 17:11:30,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:30,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:30,975 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:31,282 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-07-09 17:11:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:31,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:31,282 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:11:31,282 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:11:31,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:11:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-07-09 17:11:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-09 17:11:31,284 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-09 17:11:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:31,284 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-09 17:11:31,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-09 17:11:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:31,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:31,284 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:31,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 17:11:31,485 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1548278486, now seen corresponding path program 130 times [2021-07-09 17:11:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084417512] [2021-07-09 17:11:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:31,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:31,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084417512] [2021-07-09 17:11:31,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084417512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:31,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67562282] [2021-07-09 17:11:31,577 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:31,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:31,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:31,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:31,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67562282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:31,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:31,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:31,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441677625] [2021-07-09 17:11:31,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:31,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:31,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:31,803 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:32,066 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-07-09 17:11:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:32,067 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:11:32,069 INFO L226 Difference]: Without dead ends: 164 [2021-07-09 17:11:32,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-09 17:11:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-07-09 17:11:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-07-09 17:11:32,071 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-07-09 17:11:32,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:32,071 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-07-09 17:11:32,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-07-09 17:11:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:32,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:32,072 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:32,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:11:32,272 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2119733292, now seen corresponding path program 131 times [2021-07-09 17:11:32,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:32,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491890941] [2021-07-09 17:11:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:32,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491890941] [2021-07-09 17:11:32,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491890941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548434955] [2021-07-09 17:11:32,357 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:32,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:11:32,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:32,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:32,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548434955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:32,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:32,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323608893] [2021-07-09 17:11:32,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:32,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:32,581 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:32,801 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-07-09 17:11:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:32,802 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:11:32,802 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:11:32,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:11:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-07-09 17:11:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-07-09 17:11:32,803 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-07-09 17:11:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:32,803 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-07-09 17:11:32,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-07-09 17:11:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:32,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:32,804 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:33,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 17:11:33,004 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:33,005 INFO L82 PathProgramCache]: Analyzing trace with hash -737818470, now seen corresponding path program 132 times [2021-07-09 17:11:33,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:33,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293515115] [2021-07-09 17:11:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:33,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:33,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293515115] [2021-07-09 17:11:33,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293515115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:33,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437412155] [2021-07-09 17:11:33,086 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:33,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:11:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:33,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:33,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437412155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:33,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:33,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 17:11:33,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992655546] [2021-07-09 17:11:33,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:33,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:33,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:33,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:33,316 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:33,929 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-07-09 17:11:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:11:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-07-09 17:11:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:33,930 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:11:33,930 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:11:33,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:11:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-07-09 17:11:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-07-09 17:11:33,931 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-07-09 17:11:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:33,932 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-07-09 17:11:33,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-07-09 17:11:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:33,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:33,932 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:34,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:34,133 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1120538858, now seen corresponding path program 133 times [2021-07-09 17:11:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:34,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632417845] [2021-07-09 17:11:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:34,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:34,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632417845] [2021-07-09 17:11:34,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632417845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:34,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196553507] [2021-07-09 17:11:34,213 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:34,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:34,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196553507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:34,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:34,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 17:11:34,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929769248] [2021-07-09 17:11:34,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:34,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:34,442 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:34,941 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-07-09 17:11:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:11:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-07-09 17:11:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:34,942 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:11:34,942 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:11:34,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:11:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:11:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-07-09 17:11:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-09 17:11:34,944 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-09 17:11:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:34,944 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-09 17:11:34,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-09 17:11:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:34,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:34,944 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:35,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,145 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 958754970, now seen corresponding path program 134 times [2021-07-09 17:11:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:35,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709765873] [2021-07-09 17:11:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:35,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:35,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709765873] [2021-07-09 17:11:35,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709765873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121046261] [2021-07-09 17:11:35,234 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:35,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121046261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:35,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 17:11:35,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568134560] [2021-07-09 17:11:35,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:35,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:35,496 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:36,323 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-07-09 17:11:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:11:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-07-09 17:11:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:36,323 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:11:36,323 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:11:36,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:11:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:11:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-07-09 17:11:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:36,326 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:36,326 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:36,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:36,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:36,326 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:36,529 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 974215766, now seen corresponding path program 135 times [2021-07-09 17:11:36,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:36,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506712120] [2021-07-09 17:11:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:36,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506712120] [2021-07-09 17:11:36,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506712120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648568233] [2021-07-09 17:11:36,628 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:36,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:11:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:36,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:36,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648568233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:36,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:36,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 17:11:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848651468] [2021-07-09 17:11:36,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:36,923 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:37,793 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-07-09 17:11:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:11:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-07-09 17:11:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:37,794 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:11:37,794 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:11:37,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 834.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:11:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:11:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-07-09 17:11:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:37,796 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:37,796 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:37,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-07-09 17:11:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:37,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:37,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:38,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,001 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1581877714, now seen corresponding path program 136 times [2021-07-09 17:11:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:38,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684363209] [2021-07-09 17:11:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:38,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684363209] [2021-07-09 17:11:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684363209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352966802] [2021-07-09 17:11:38,092 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:38,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:38,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352966802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:38,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:38,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645129961] [2021-07-09 17:11:38,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:38,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:38,323 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:38,523 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-07-09 17:11:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:11:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:38,524 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:11:38,524 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:11:38,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:11:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-07-09 17:11:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-09 17:11:38,525 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-09 17:11:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:38,526 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-09 17:11:38,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:11:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-09 17:11:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:38,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:38,526 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:38,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 17:11:38,727 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash 811172182, now seen corresponding path program 137 times [2021-07-09 17:11:38,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:38,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672166921] [2021-07-09 17:11:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:38,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:38,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672166921] [2021-07-09 17:11:38,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672166921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405180476] [2021-07-09 17:11:38,815 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:38,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:39,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405180476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:39,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:39,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:11:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543692688] [2021-07-09 17:11:39,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:39,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:39,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:39,013 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:39,676 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-07-09 17:11:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:11:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:11:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:39,677 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:11:39,677 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:11:39,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:11:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-07-09 17:11:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-09 17:11:39,679 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-09 17:11:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:39,679 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-09 17:11:39,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-09 17:11:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:39,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:39,679 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:39,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 17:11:39,880 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:39,880 INFO L82 PathProgramCache]: Analyzing trace with hash 826632978, now seen corresponding path program 138 times [2021-07-09 17:11:39,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:39,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807628976] [2021-07-09 17:11:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:39,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:39,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807628976] [2021-07-09 17:11:39,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807628976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:39,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14139648] [2021-07-09 17:11:39,970 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:39,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:11:39,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:39,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:39,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:40,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14139648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:40,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:11:40,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871946397] [2021-07-09 17:11:40,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:40,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:40,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:40,161 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:40,840 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-07-09 17:11:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:11:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:11:40,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:40,841 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:11:40,841 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:11:40,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:11:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-07-09 17:11:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-09 17:11:40,843 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-09 17:11:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:40,843 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-09 17:11:40,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-09 17:11:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:40,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:40,844 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:41,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 17:11:41,067 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:41,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1398087784, now seen corresponding path program 139 times [2021-07-09 17:11:41,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:41,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517086514] [2021-07-09 17:11:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:41,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:41,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517086514] [2021-07-09 17:11:41,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517086514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:41,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338964218] [2021-07-09 17:11:41,163 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:11:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:41,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:41,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:41,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338964218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:41,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:41,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:11:41,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761649103] [2021-07-09 17:11:41,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:41,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:41,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:41,383 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:42,124 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-07-09 17:11:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:11:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:11:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:42,125 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:11:42,125 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:11:42,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 712.8ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:11:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-07-09 17:11:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:42,128 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:42,128 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:42,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:42,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:42,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:42,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:11:42,329 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:42,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1459463978, now seen corresponding path program 140 times [2021-07-09 17:11:42,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:42,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204460886] [2021-07-09 17:11:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:42,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204460886] [2021-07-09 17:11:42,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204460886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:42,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626565892] [2021-07-09 17:11:42,413 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:42,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:42,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:42,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:42,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626565892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:42,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:42,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:42,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6232559] [2021-07-09 17:11:42,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:42,646 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:42,866 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-07-09 17:11:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:42,867 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:11:42,867 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:11:42,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:11:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-07-09 17:11:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:42,869 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:42,869 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:42,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:42,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:42,869 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:43,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-09 17:11:43,070 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:43,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1842184366, now seen corresponding path program 141 times [2021-07-09 17:11:43,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:43,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901373511] [2021-07-09 17:11:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:43,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:43,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901373511] [2021-07-09 17:11:43,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901373511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546420785] [2021-07-09 17:11:43,153 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:43,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:43,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:43,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546420785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:43,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:43,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268256717] [2021-07-09 17:11:43,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:43,388 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:43,586 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-07-09 17:11:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:43,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:43,586 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:11:43,586 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:11:43,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:11:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-07-09 17:11:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-09 17:11:43,588 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-09 17:11:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:43,588 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-09 17:11:43,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-09 17:11:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:43,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:43,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:43,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 17:11:43,793 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash 237109462, now seen corresponding path program 142 times [2021-07-09 17:11:43,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:43,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031180095] [2021-07-09 17:11:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:43,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:43,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031180095] [2021-07-09 17:11:43,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031180095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005101128] [2021-07-09 17:11:43,881 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:43,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:43,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:44,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005101128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:44,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:44,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977008002] [2021-07-09 17:11:44,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:44,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:44,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:44,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:44,109 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:44,356 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-07-09 17:11:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:44,357 INFO L225 Difference]: With dead ends: 183 [2021-07-09 17:11:44,357 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 17:11:44,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 17:11:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-07-09 17:11:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-09 17:11:44,359 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-09 17:11:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:44,359 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-09 17:11:44,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-09 17:11:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:44,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:44,359 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:44,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:44,560 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash 252570258, now seen corresponding path program 143 times [2021-07-09 17:11:44,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:44,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644292126] [2021-07-09 17:11:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:44,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:44,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644292126] [2021-07-09 17:11:44,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644292126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84110608] [2021-07-09 17:11:44,657 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:44,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:11:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:44,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84110608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:44,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:44,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241500004] [2021-07-09 17:11:44,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:44,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:44,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:44,879 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:45,116 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-07-09 17:11:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:45,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:45,117 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:11:45,117 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:11:45,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:11:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-07-09 17:11:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:11:45,119 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:11:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:45,119 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:11:45,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:11:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:45,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:45,119 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:45,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:45,320 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:45,320 INFO L82 PathProgramCache]: Analyzing trace with hash 860232206, now seen corresponding path program 144 times [2021-07-09 17:11:45,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:45,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264579982] [2021-07-09 17:11:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:45,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:45,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264579982] [2021-07-09 17:11:45,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264579982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:45,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263290974] [2021-07-09 17:11:45,405 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:45,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:45,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:45,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263290974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:45,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:45,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:11:45,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531448088] [2021-07-09 17:11:45,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:45,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:45,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:45,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:45,597 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:46,379 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-07-09 17:11:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:11:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:46,380 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:11:46,380 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:11:46,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 746.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:11:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:11:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-07-09 17:11:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-07-09 17:11:46,382 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-07-09 17:11:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:46,382 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-07-09 17:11:46,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-07-09 17:11:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:46,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:46,382 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:46,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:46,583 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash -829491834, now seen corresponding path program 145 times [2021-07-09 17:11:46,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:46,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438473171] [2021-07-09 17:11:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:46,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438473171] [2021-07-09 17:11:46,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438473171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:46,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869397135] [2021-07-09 17:11:46,669 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:46,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:46,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869397135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:46,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:46,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:46,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658154009] [2021-07-09 17:11:46,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:46,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:46,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:46,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:46,909 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:47,101 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-07-09 17:11:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:47,101 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:11:47,101 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:11:47,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:11:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-07-09 17:11:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-07-09 17:11:47,103 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-07-09 17:11:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:47,103 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-07-09 17:11:47,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-07-09 17:11:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:47,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:47,103 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:47,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,304 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1249801994, now seen corresponding path program 146 times [2021-07-09 17:11:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:47,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137919213] [2021-07-09 17:11:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:47,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:47,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137919213] [2021-07-09 17:11:47,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137919213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231137340] [2021-07-09 17:11:47,403 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:47,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231137340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:47,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265202501] [2021-07-09 17:11:47,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:47,644 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:47,911 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-07-09 17:11:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:47,911 INFO L225 Difference]: With dead ends: 149 [2021-07-09 17:11:47,911 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:11:47,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:11:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-07-09 17:11:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-09 17:11:47,913 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-09 17:11:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:47,913 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-09 17:11:47,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-09 17:11:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:47,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:47,914 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:48,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:48,121 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1265262790, now seen corresponding path program 147 times [2021-07-09 17:11:48,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:48,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853013402] [2021-07-09 17:11:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:48,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:48,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853013402] [2021-07-09 17:11:48,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853013402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:48,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246718645] [2021-07-09 17:11:48,213 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:48,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:11:48,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:48,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:48,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246718645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:48,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:48,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:48,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292505429] [2021-07-09 17:11:48,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:48,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:48,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:48,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:48,448 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:48,645 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-07-09 17:11:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:48,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:48,645 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:11:48,645 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:11:48,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:11:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-07-09 17:11:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-09 17:11:48,647 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-07-09 17:11:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:48,647 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-09 17:11:48,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-09 17:11:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:48,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:48,647 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:48,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:48,848 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:48,848 INFO L82 PathProgramCache]: Analyzing trace with hash -898994542, now seen corresponding path program 148 times [2021-07-09 17:11:48,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:48,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972266654] [2021-07-09 17:11:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:48,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:48,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972266654] [2021-07-09 17:11:48,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972266654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:48,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238883669] [2021-07-09 17:11:48,941 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:48,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238883669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:49,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213615343] [2021-07-09 17:11:49,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:49,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:49,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:49,173 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:49,411 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-07-09 17:11:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:49,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:49,412 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:11:49,412 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:11:49,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:11:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-07-09 17:11:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-09 17:11:49,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-09 17:11:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:49,413 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-09 17:11:49,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-09 17:11:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:49,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:49,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:49,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 17:11:49,614 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash -883533746, now seen corresponding path program 149 times [2021-07-09 17:11:49,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:49,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836498361] [2021-07-09 17:11:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:49,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:49,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836498361] [2021-07-09 17:11:49,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836498361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896434523] [2021-07-09 17:11:49,716 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:49,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:49,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:49,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896434523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:49,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827521076] [2021-07-09 17:11:49,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:49,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:49,964 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:50,168 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-07-09 17:11:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:50,169 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:11:50,169 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:11:50,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:11:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-07-09 17:11:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-07-09 17:11:50,170 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-07-09 17:11:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:50,171 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-07-09 17:11:50,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-07-09 17:11:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:50,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:50,171 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:50,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 17:11:50,372 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash -312078940, now seen corresponding path program 150 times [2021-07-09 17:11:50,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:50,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433510703] [2021-07-09 17:11:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:50,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433510703] [2021-07-09 17:11:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433510703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403657760] [2021-07-09 17:11:50,461 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:50,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:50,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403657760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:50,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:50,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:50,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107173406] [2021-07-09 17:11:50,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:50,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:50,711 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:50,911 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-07-09 17:11:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:50,912 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:11:50,912 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:11:50,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:11:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-07-09 17:11:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-07-09 17:11:50,913 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-07-09 17:11:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:50,913 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-07-09 17:11:50,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-07-09 17:11:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:50,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:50,913 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:51,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:11:51,114 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash 56306446, now seen corresponding path program 151 times [2021-07-09 17:11:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:51,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097343165] [2021-07-09 17:11:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:51,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:51,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097343165] [2021-07-09 17:11:51,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097343165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:51,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319840812] [2021-07-09 17:11:51,199 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:51,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319840812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:51,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:51,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:51,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640803671] [2021-07-09 17:11:51,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:51,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:51,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:51,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:51,436 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:51,607 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-07-09 17:11:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:51,608 INFO L225 Difference]: With dead ends: 130 [2021-07-09 17:11:51,608 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:11:51,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:11:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-07-09 17:11:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-07-09 17:11:51,610 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-07-09 17:11:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:51,610 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-07-09 17:11:51,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-07-09 17:11:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:51,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:51,610 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:51,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:51,811 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2135600274, now seen corresponding path program 152 times [2021-07-09 17:11:51,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:51,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311499884] [2021-07-09 17:11:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:51,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311499884] [2021-07-09 17:11:51,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311499884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932194574] [2021-07-09 17:11:51,900 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:51,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:51,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:51,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932194574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:52,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:52,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:52,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534770207] [2021-07-09 17:11:52,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:52,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:52,130 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:52,341 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-07-09 17:11:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:52,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:52,341 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:11:52,342 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:11:52,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:52,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:11:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-07-09 17:11:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-07-09 17:11:52,343 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-07-09 17:11:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:52,343 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-07-09 17:11:52,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-07-09 17:11:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:52,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:52,343 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:52,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-09 17:11:52,544 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2143906226, now seen corresponding path program 153 times [2021-07-09 17:11:52,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:52,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796490980] [2021-07-09 17:11:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:52,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:52,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796490980] [2021-07-09 17:11:52,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796490980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:52,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198937065] [2021-07-09 17:11:52,668 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:52,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:11:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:52,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198937065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:52,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:52,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:52,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063245488] [2021-07-09 17:11:52,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:52,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:52,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:52,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:52,910 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:53,174 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-07-09 17:11:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:53,174 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:11:53,174 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:11:53,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:11:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-07-09 17:11:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-07-09 17:11:53,177 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-07-09 17:11:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:53,177 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-07-09 17:11:53,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-07-09 17:11:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:53,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:53,177 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:53,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:53,400 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash -13196262, now seen corresponding path program 154 times [2021-07-09 17:11:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:53,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055762661] [2021-07-09 17:11:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:53,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:53,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055762661] [2021-07-09 17:11:53,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055762661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:53,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142097785] [2021-07-09 17:11:53,488 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:53,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:53,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142097785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:53,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:53,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:53,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273886211] [2021-07-09 17:11:53,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:53,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:53,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:53,723 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:53,985 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-07-09 17:11:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:53,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:53,986 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:11:53,986 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:11:53,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:11:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-07-09 17:11:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-07-09 17:11:53,988 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-07-09 17:11:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:53,988 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-07-09 17:11:53,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-07-09 17:11:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:53,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:53,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:54,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:54,189 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2264534, now seen corresponding path program 155 times [2021-07-09 17:11:54,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:54,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167394084] [2021-07-09 17:11:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:54,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167394084] [2021-07-09 17:11:54,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167394084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175853535] [2021-07-09 17:11:54,292 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:54,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:54,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:54,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:54,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175853535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:54,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:54,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35485585] [2021-07-09 17:11:54,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:54,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:54,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:54,520 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:54,786 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-07-09 17:11:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:54,787 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:11:54,787 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:11:54,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:11:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-07-09 17:11:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-07-09 17:11:54,789 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-07-09 17:11:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:54,789 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-07-09 17:11:54,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-07-09 17:11:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:54,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:54,789 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:54,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-07-09 17:11:54,990 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash 573719340, now seen corresponding path program 156 times [2021-07-09 17:11:54,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:54,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339080591] [2021-07-09 17:11:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:55,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:55,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339080591] [2021-07-09 17:11:55,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339080591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782731103] [2021-07-09 17:11:55,075 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:55,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:55,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:55,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:55,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:55,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782731103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:55,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172663718] [2021-07-09 17:11:55,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:55,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:55,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:55,307 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:55,507 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-07-09 17:11:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:55,507 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:11:55,507 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:11:55,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:11:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-07-09 17:11:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-07-09 17:11:55,509 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-07-09 17:11:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:55,509 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-07-09 17:11:55,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-07-09 17:11:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:55,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:55,510 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:55,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:55,710 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1107287850, now seen corresponding path program 157 times [2021-07-09 17:11:55,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:55,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561313037] [2021-07-09 17:11:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:55,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:55,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561313037] [2021-07-09 17:11:55,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561313037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890299976] [2021-07-09 17:11:55,800 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:56,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890299976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:56,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:56,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176608492] [2021-07-09 17:11:56,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:56,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:56,027 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:56,309 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-07-09 17:11:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:56,310 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:11:56,310 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:11:56,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:11:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-07-09 17:11:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-07-09 17:11:56,311 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-07-09 17:11:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:56,311 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-07-09 17:11:56,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-07-09 17:11:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:56,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:56,312 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:56,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:56,512 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1091827054, now seen corresponding path program 158 times [2021-07-09 17:11:56,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:56,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843129802] [2021-07-09 17:11:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:56,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:56,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843129802] [2021-07-09 17:11:56,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843129802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273829157] [2021-07-09 17:11:56,603 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:56,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:56,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273829157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:56,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:56,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253869652] [2021-07-09 17:11:56,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:56,864 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:57,214 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-07-09 17:11:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:57,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:57,215 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:11:57,215 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:11:57,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:11:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-07-09 17:11:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-07-09 17:11:57,217 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-07-09 17:11:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:57,217 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-07-09 17:11:57,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-07-09 17:11:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:57,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:57,217 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:57,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-09 17:11:57,418 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -520372248, now seen corresponding path program 159 times [2021-07-09 17:11:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628345999] [2021-07-09 17:11:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:57,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:57,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628345999] [2021-07-09 17:11:57,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628345999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:57,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103556141] [2021-07-09 17:11:57,505 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:57,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:57,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:57,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103556141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:57,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:57,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:11:57,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194413404] [2021-07-09 17:11:57,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:11:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:11:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:57,734 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:57,919 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-07-09 17:11:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:11:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:57,920 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:11:57,920 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:11:57,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:11:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-07-09 17:11:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-07-09 17:11:57,922 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-07-09 17:11:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:57,922 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-07-09 17:11:57,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:11:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-07-09 17:11:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:57,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:57,922 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:58,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 17:11:58,123 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash 917043286, now seen corresponding path program 160 times [2021-07-09 17:11:58,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:58,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381771306] [2021-07-09 17:11:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:58,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:58,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381771306] [2021-07-09 17:11:58,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381771306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679096050] [2021-07-09 17:11:58,205 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:58,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:58,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679096050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:58,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:11:58,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222605356] [2021-07-09 17:11:58,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:58,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:58,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:58,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:58,395 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:59,020 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-07-09 17:11:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:11:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:11:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:59,021 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:11:59,021 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:11:59,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:11:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-07-09 17:11:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-07-09 17:11:59,023 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-07-09 17:11:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:59,023 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-07-09 17:11:59,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:11:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-07-09 17:11:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:11:59,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:59,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:59,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-09 17:11:59,241 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:59,241 INFO L82 PathProgramCache]: Analyzing trace with hash 534322898, now seen corresponding path program 161 times [2021-07-09 17:11:59,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:59,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703701931] [2021-07-09 17:11:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:59,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703701931] [2021-07-09 17:11:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703701931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273657400] [2021-07-09 17:11:59,334 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:59,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:59,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:59,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273657400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:59,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:59,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:11:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259328700] [2021-07-09 17:11:59,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:59,700 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:00,111 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-07-09 17:12:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:12:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:00,112 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:12:00,112 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:12:00,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 477.2ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:12:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-07-09 17:12:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-09 17:12:00,113 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-09 17:12:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:00,113 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-09 17:12:00,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-09 17:12:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:00,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:00,114 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:00,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:12:00,314 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:00,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1681350570, now seen corresponding path program 162 times [2021-07-09 17:12:00,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:00,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397998766] [2021-07-09 17:12:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:00,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397998766] [2021-07-09 17:12:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397998766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362209047] [2021-07-09 17:12:00,400 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:00,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:00,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:00,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362209047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:00,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:00,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868942480] [2021-07-09 17:12:00,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:00,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:00,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:00,622 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:01,233 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-07-09 17:12:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:12:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:01,234 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:12:01,234 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:12:01,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:12:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:12:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-07-09 17:12:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-07-09 17:12:01,235 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-07-09 17:12:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:01,235 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-07-09 17:12:01,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-07-09 17:12:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:01,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:01,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:01,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-09 17:12:01,436 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1665889774, now seen corresponding path program 163 times [2021-07-09 17:12:01,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:01,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489092951] [2021-07-09 17:12:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:01,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:01,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489092951] [2021-07-09 17:12:01,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489092951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:01,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876210012] [2021-07-09 17:12:01,525 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:01,546 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:02,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876210012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:02,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:02,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:02,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283370646] [2021-07-09 17:12:02,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:02,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:02,057 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:02,704 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-07-09 17:12:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:12:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:02,705 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:12:02,705 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:12:02,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:12:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:12:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-07-09 17:12:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-07-09 17:12:02,707 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-07-09 17:12:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:02,707 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-07-09 17:12:02,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-07-09 17:12:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:02,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:02,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:02,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:02,908 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1058227826, now seen corresponding path program 164 times [2021-07-09 17:12:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:02,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897843151] [2021-07-09 17:12:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:03,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897843151] [2021-07-09 17:12:03,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897843151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725545629] [2021-07-09 17:12:03,017 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:03,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:03,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725545629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:03,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:03,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:03,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978891557] [2021-07-09 17:12:03,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:03,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:03,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:03,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:03,241 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:03,443 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-07-09 17:12:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:03,444 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:12:03,444 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:12:03,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:12:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-07-09 17:12:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-09 17:12:03,445 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-09 17:12:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:03,445 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-09 17:12:03,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-09 17:12:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:03,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:03,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:03,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:03,646 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:03,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1703746494, now seen corresponding path program 165 times [2021-07-09 17:12:03,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:03,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568148984] [2021-07-09 17:12:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:03,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568148984] [2021-07-09 17:12:03,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568148984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715595954] [2021-07-09 17:12:03,730 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:03,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:12:03,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:03,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715595954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:03,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169387415] [2021-07-09 17:12:03,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:03,965 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:04,154 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-07-09 17:12:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:04,155 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:12:04,155 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:12:04,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:12:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-07-09 17:12:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-09 17:12:04,156 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-07-09 17:12:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:04,156 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-09 17:12:04,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-09 17:12:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:04,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:04,157 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:04,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:04,357 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 375547334, now seen corresponding path program 166 times [2021-07-09 17:12:04,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:04,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854891633] [2021-07-09 17:12:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:04,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854891633] [2021-07-09 17:12:04,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854891633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222377586] [2021-07-09 17:12:04,449 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:04,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:04,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:04,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:04,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:04,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222377586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:04,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406680761] [2021-07-09 17:12:04,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:04,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:04,691 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:04,921 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-07-09 17:12:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:04,921 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:12:04,921 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:12:04,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:12:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-07-09 17:12:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-07-09 17:12:04,923 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-07-09 17:12:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:04,923 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-07-09 17:12:04,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-07-09 17:12:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:04,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:04,924 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:05,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,129 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 391008130, now seen corresponding path program 167 times [2021-07-09 17:12:05,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:05,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37000045] [2021-07-09 17:12:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:05,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:05,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37000045] [2021-07-09 17:12:05,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37000045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:05,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939569620] [2021-07-09 17:12:05,220 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:12:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939569620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453409978] [2021-07-09 17:12:05,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:05,448 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:05,699 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-07-09 17:12:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:05,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:05,699 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:12:05,699 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:12:05,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:12:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-07-09 17:12:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-09 17:12:05,701 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-07-09 17:12:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:05,701 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-09 17:12:05,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-09 17:12:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:05,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:05,701 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:05,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,902 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1773249202, now seen corresponding path program 168 times [2021-07-09 17:12:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:05,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737821490] [2021-07-09 17:12:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:06,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737821490] [2021-07-09 17:12:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737821490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746572427] [2021-07-09 17:12:06,013 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:06,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:12:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746572427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:06,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:06,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:06,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890920935] [2021-07-09 17:12:06,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:06,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:06,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:06,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:06,312 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:06,614 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-07-09 17:12:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:06,614 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:12:06,614 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:12:06,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:12:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-07-09 17:12:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-07-09 17:12:06,616 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-07-09 17:12:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:06,616 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-07-09 17:12:06,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-07-09 17:12:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:06,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:06,616 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:06,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:06,817 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1757788406, now seen corresponding path program 169 times [2021-07-09 17:12:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:06,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454745576] [2021-07-09 17:12:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:06,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:06,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454745576] [2021-07-09 17:12:06,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454745576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:06,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314459405] [2021-07-09 17:12:06,916 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:07,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314459405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:07,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:07,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628075863] [2021-07-09 17:12:07,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:07,142 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:07,458 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-07-09 17:12:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:07,459 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:12:07,459 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:12:07,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:12:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-07-09 17:12:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-09 17:12:07,460 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-07-09 17:12:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:07,460 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-09 17:12:07,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-09 17:12:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:07,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:07,461 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:07,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-09 17:12:07,661 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1186333600, now seen corresponding path program 170 times [2021-07-09 17:12:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:07,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036082986] [2021-07-09 17:12:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:07,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036082986] [2021-07-09 17:12:07,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036082986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151074613] [2021-07-09 17:12:07,744 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:07,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:07,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151074613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:07,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322164527] [2021-07-09 17:12:07,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:07,977 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:08,194 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-07-09 17:12:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:08,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:08,195 INFO L225 Difference]: With dead ends: 132 [2021-07-09 17:12:08,195 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:12:08,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:12:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-07-09 17:12:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-07-09 17:12:08,196 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-07-09 17:12:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:08,196 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-07-09 17:12:08,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-07-09 17:12:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:08,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:08,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:08,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 17:12:08,397 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1427626506, now seen corresponding path program 171 times [2021-07-09 17:12:08,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:08,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749539092] [2021-07-09 17:12:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:08,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749539092] [2021-07-09 17:12:08,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749539092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417343958] [2021-07-09 17:12:08,493 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:08,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:12:08,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:08,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417343958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:08,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:08,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:08,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21050422] [2021-07-09 17:12:08,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:08,724 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:09,070 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-07-09 17:12:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:09,071 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:12:09,071 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:12:09,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:12:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-07-09 17:12:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-09 17:12:09,072 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-07-09 17:12:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:09,072 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-09 17:12:09,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-09 17:12:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:09,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:09,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:09,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 17:12:09,273 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:09,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1443087302, now seen corresponding path program 172 times [2021-07-09 17:12:09,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:09,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025150413] [2021-07-09 17:12:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:09,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:09,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025150413] [2021-07-09 17:12:09,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025150413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:09,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063239776] [2021-07-09 17:12:09,364 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:09,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:09,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:09,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:09,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063239776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:09,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:09,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:09,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111993977] [2021-07-09 17:12:09,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:09,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:09,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:09,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:09,588 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:09,918 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-07-09 17:12:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:09,919 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:12:09,919 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:12:09,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:12:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-07-09 17:12:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-07-09 17:12:09,921 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-07-09 17:12:09,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:09,921 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-07-09 17:12:09,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-07-09 17:12:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:09,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:09,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:10,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,122 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2014542108, now seen corresponding path program 173 times [2021-07-09 17:12:10,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:10,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381622590] [2021-07-09 17:12:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:10,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:10,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381622590] [2021-07-09 17:12:10,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381622590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759251607] [2021-07-09 17:12:10,254 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:10,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:10,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759251607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:10,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:10,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875525697] [2021-07-09 17:12:10,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:10,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:10,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:10,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:10,522 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:10,781 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-07-09 17:12:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:10,782 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:12:10,782 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:12:10,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:12:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-07-09 17:12:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-09 17:12:10,783 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-09 17:12:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:10,783 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-09 17:12:10,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-09 17:12:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:10,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:10,784 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:10,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,989 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:10,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686530, now seen corresponding path program 174 times [2021-07-09 17:12:10,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:10,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760523665] [2021-07-09 17:12:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:11,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:11,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760523665] [2021-07-09 17:12:11,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760523665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:11,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307803027] [2021-07-09 17:12:11,073 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:11,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:11,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:11,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:11,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307803027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:11,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:11,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:11,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438991232] [2021-07-09 17:12:11,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:11,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:11,319 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:11,515 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-07-09 17:12:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:11,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:11,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:11,515 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:12:11,515 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:12:11,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:12:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-07-09 17:12:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-09 17:12:11,517 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-09 17:12:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:11,517 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-09 17:12:11,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-09 17:12:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:11,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:11,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:11,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 17:12:11,718 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1981542510, now seen corresponding path program 175 times [2021-07-09 17:12:11,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:11,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480506137] [2021-07-09 17:12:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:11,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:11,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480506137] [2021-07-09 17:12:11,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480506137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:11,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442224680] [2021-07-09 17:12:11,806 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:11,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:11,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442224680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:12,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152691961] [2021-07-09 17:12:12,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:12,035 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:12,315 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-07-09 17:12:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:12,315 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:12:12,315 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:12:12,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:12:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-07-09 17:12:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-09 17:12:12,317 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-07-09 17:12:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:12,317 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-09 17:12:12,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-09 17:12:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:12,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:12,317 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:12,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,518 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1966081714, now seen corresponding path program 176 times [2021-07-09 17:12:12,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:12,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433479155] [2021-07-09 17:12:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:12,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:12,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433479155] [2021-07-09 17:12:12,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433479155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916506472] [2021-07-09 17:12:12,607 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:12,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:12,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:12,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916506472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:12,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:12,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417683226] [2021-07-09 17:12:12,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:12,831 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:13,111 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-07-09 17:12:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:13,112 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:12:13,112 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:12:13,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:12:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-07-09 17:12:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-07-09 17:12:13,113 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-07-09 17:12:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:13,113 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-07-09 17:12:13,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-07-09 17:12:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:13,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:13,114 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:13,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:13,314 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1394626908, now seen corresponding path program 177 times [2021-07-09 17:12:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:13,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563845736] [2021-07-09 17:12:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:13,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563845736] [2021-07-09 17:12:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563845736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977439468] [2021-07-09 17:12:13,401 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:13,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977439468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:13,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:13,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432378093] [2021-07-09 17:12:13,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:13,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:13,634 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:13,864 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-07-09 17:12:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:13,864 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:12:13,864 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:12:13,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:12:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-07-09 17:12:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-07-09 17:12:13,866 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-07-09 17:12:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:13,866 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-07-09 17:12:13,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-07-09 17:12:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:13,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:13,866 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:14,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,067 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash 42788626, now seen corresponding path program 178 times [2021-07-09 17:12:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:14,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33034466] [2021-07-09 17:12:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:14,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:14,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33034466] [2021-07-09 17:12:14,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33034466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:14,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078345375] [2021-07-09 17:12:14,175 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:14,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:14,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078345375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:14,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:14,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079848933] [2021-07-09 17:12:14,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:14,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:14,402 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:14,687 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-07-09 17:12:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:14,688 INFO L225 Difference]: With dead ends: 175 [2021-07-09 17:12:14,688 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:12:14,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:12:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-07-09 17:12:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-07-09 17:12:14,690 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-07-09 17:12:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:14,690 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-07-09 17:12:14,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-07-09 17:12:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:14,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:14,690 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:14,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,891 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:14,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:14,891 INFO L82 PathProgramCache]: Analyzing trace with hash -339931762, now seen corresponding path program 179 times [2021-07-09 17:12:14,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:14,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185846952] [2021-07-09 17:12:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:14,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185846952] [2021-07-09 17:12:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185846952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969249263] [2021-07-09 17:12:14,972 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:14,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:14,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:14,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969249263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:15,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:15,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:15,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399910621] [2021-07-09 17:12:15,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:15,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:15,157 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:15,518 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-07-09 17:12:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:15,519 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:12:15,519 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:12:15,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:12:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-07-09 17:12:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-07-09 17:12:15,521 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-07-09 17:12:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:15,521 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-07-09 17:12:15,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-07-09 17:12:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:15,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:15,522 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:15,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:15,737 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1739362066, now seen corresponding path program 180 times [2021-07-09 17:12:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:15,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375297753] [2021-07-09 17:12:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:15,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:15,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375297753] [2021-07-09 17:12:15,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375297753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:15,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770292759] [2021-07-09 17:12:15,826 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:15,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:15,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:16,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770292759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:16,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:16,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:16,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090533637] [2021-07-09 17:12:16,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:16,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:16,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:16,025 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:16,471 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-07-09 17:12:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:12:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:16,472 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:12:16,472 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:12:16,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:12:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-07-09 17:12:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-07-09 17:12:16,474 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-07-09 17:12:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:16,475 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-07-09 17:12:16,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-07-09 17:12:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:16,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:16,475 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:16,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:16,688 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1754822862, now seen corresponding path program 181 times [2021-07-09 17:12:16,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:16,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506797217] [2021-07-09 17:12:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:16,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:16,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506797217] [2021-07-09 17:12:16,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506797217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:16,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860491377] [2021-07-09 17:12:16,775 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:16,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:17,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860491377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:17,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:17,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:17,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637135797] [2021-07-09 17:12:17,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:17,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:17,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:17,214 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:17,592 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-07-09 17:12:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:17,593 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:12:17,593 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:12:17,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:12:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-07-09 17:12:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-07-09 17:12:17,595 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-07-09 17:12:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:17,595 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-07-09 17:12:17,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-07-09 17:12:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:17,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:17,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:17,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 17:12:17,805 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1932482486, now seen corresponding path program 182 times [2021-07-09 17:12:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:17,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374735136] [2021-07-09 17:12:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:17,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:17,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374735136] [2021-07-09 17:12:17,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374735136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:17,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453473615] [2021-07-09 17:12:17,889 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:17,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:18,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453473615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:18,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:18,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:18,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802765206] [2021-07-09 17:12:18,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:18,125 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:18,372 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-07-09 17:12:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-07-09 17:12:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:18,373 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:12:18,373 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:12:18,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:12:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-07-09 17:12:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-07-09 17:12:18,375 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-07-09 17:12:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:18,375 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-07-09 17:12:18,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-09 17:12:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-07-09 17:12:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:18,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:18,375 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:18,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-09 17:12:18,581 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash 672760770, now seen corresponding path program 183 times [2021-07-09 17:12:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:18,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647213969] [2021-07-09 17:12:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:18,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:18,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647213969] [2021-07-09 17:12:18,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647213969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:18,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395342513] [2021-07-09 17:12:18,678 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:18,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:18,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:18,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395342513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:18,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:18,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457209063] [2021-07-09 17:12:18,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:18,884 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:19,147 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-07-09 17:12:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:19,148 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:12:19,148 INFO L226 Difference]: Without dead ends: 128 [2021-07-09 17:12:19,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-09 17:12:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-07-09 17:12:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-07-09 17:12:19,150 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-07-09 17:12:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:19,150 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-07-09 17:12:19,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-07-09 17:12:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:19,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:19,150 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:19,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:19,353 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1542912698, now seen corresponding path program 184 times [2021-07-09 17:12:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:19,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000459773] [2021-07-09 17:12:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:19,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000459773] [2021-07-09 17:12:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000459773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209368553] [2021-07-09 17:12:19,459 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:19,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:19,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:19,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209368553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:19,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:19,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:19,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495144785] [2021-07-09 17:12:19,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:19,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:19,659 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:20,071 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-07-09 17:12:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:20,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:20,072 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:12:20,072 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 17:12:20,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 17:12:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-07-09 17:12:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-09 17:12:20,074 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-07-09 17:12:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:20,074 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-09 17:12:20,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-09 17:12:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:20,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:20,074 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:20,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-09 17:12:20,277 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1527451902, now seen corresponding path program 185 times [2021-07-09 17:12:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754219115] [2021-07-09 17:12:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:20,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:20,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754219115] [2021-07-09 17:12:20,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754219115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:20,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066813977] [2021-07-09 17:12:20,366 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:20,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:12:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:20,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:20,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:20,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066813977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:20,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:20,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:20,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630335572] [2021-07-09 17:12:20,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:20,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:20,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:20,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:20,571 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:20,929 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-07-09 17:12:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:20,930 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:12:20,930 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:12:20,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:12:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-07-09 17:12:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-09 17:12:20,932 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-09 17:12:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:20,932 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-09 17:12:20,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-09 17:12:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:20,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:20,932 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:21,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:21,132 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash 603258062, now seen corresponding path program 186 times [2021-07-09 17:12:21,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:21,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370510362] [2021-07-09 17:12:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:21,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370510362] [2021-07-09 17:12:21,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370510362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868976575] [2021-07-09 17:12:21,221 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:21,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:21,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:21,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:21,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868976575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:21,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:21,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:21,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856232031] [2021-07-09 17:12:21,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:21,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:21,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:21,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:21,428 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:21,734 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-07-09 17:12:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:21,734 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:12:21,734 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:12:21,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:12:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-07-09 17:12:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-09 17:12:21,736 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-07-09 17:12:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:21,736 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-09 17:12:21,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-09 17:12:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:21,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:21,736 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:21,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-09 17:12:21,937 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash 618718858, now seen corresponding path program 187 times [2021-07-09 17:12:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840342489] [2021-07-09 17:12:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:22,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:22,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840342489] [2021-07-09 17:12:22,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840342489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:22,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461386707] [2021-07-09 17:12:22,027 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:22,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:22,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461386707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:22,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:22,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276370162] [2021-07-09 17:12:22,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:22,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:22,541 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:22,864 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-07-09 17:12:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:22,865 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:12:22,865 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:12:22,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:12:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-07-09 17:12:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-07-09 17:12:22,867 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-07-09 17:12:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:22,867 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-07-09 17:12:22,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-07-09 17:12:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:22,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:22,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:23,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:23,068 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1190173664, now seen corresponding path program 188 times [2021-07-09 17:12:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:23,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002483550] [2021-07-09 17:12:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:23,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:23,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002483550] [2021-07-09 17:12:23,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002483550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191304734] [2021-07-09 17:12:23,153 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:23,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:23,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:23,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:23,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191304734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:23,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:12:23,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657946981] [2021-07-09 17:12:23,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:23,548 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:23,889 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-07-09 17:12:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-07-09 17:12:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:23,890 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:12:23,890 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:12:23,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:12:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-09 17:12:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-09 17:12:23,891 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-09 17:12:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:23,891 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-09 17:12:23,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-07-09 17:12:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-09 17:12:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:23,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:23,892 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:24,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-07-09 17:12:24,092 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 668199066, now seen corresponding path program 189 times [2021-07-09 17:12:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:24,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299372051] [2021-07-09 17:12:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:24,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:24,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299372051] [2021-07-09 17:12:24,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299372051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:24,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577889162] [2021-07-09 17:12:24,179 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:24,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:24,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:24,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:24,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:24,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577889162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:24,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:24,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:24,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51729826] [2021-07-09 17:12:24,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:24,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:24,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:24,387 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:25,037 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-07-09 17:12:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:12:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:25,037 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:12:25,037 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:12:25,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:12:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:12:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-07-09 17:12:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-07-09 17:12:25,039 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-07-09 17:12:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:25,039 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-07-09 17:12:25,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:25,039 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-07-09 17:12:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:25,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:25,039 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:25,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:25,240 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 285478678, now seen corresponding path program 190 times [2021-07-09 17:12:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:25,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336388609] [2021-07-09 17:12:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:25,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:25,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336388609] [2021-07-09 17:12:25,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336388609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:25,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60658347] [2021-07-09 17:12:25,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:25,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:25,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:25,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:25,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60658347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:25,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:25,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:25,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238073617] [2021-07-09 17:12:25,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:25,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:25,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:25,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:25,570 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:26,068 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-07-09 17:12:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:12:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:26,069 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:12:26,069 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:12:26,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:12:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-07-09 17:12:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-07-09 17:12:26,071 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-07-09 17:12:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:26,071 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-07-09 17:12:26,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-07-09 17:12:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:26,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:26,071 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:26,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:26,271 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1930194790, now seen corresponding path program 191 times [2021-07-09 17:12:26,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:26,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540091187] [2021-07-09 17:12:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:26,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:26,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540091187] [2021-07-09 17:12:26,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540091187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:26,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269539406] [2021-07-09 17:12:26,372 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:26,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:26,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:26,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:26,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:26,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269539406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:26,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:26,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76467137] [2021-07-09 17:12:26,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:26,595 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:27,313 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-07-09 17:12:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:12:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:27,314 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:12:27,314 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:12:27,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:12:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:12:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-07-09 17:12:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-07-09 17:12:27,315 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-07-09 17:12:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:27,315 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-07-09 17:12:27,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-07-09 17:12:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:27,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:27,316 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:27,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 17:12:27,516 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1914733994, now seen corresponding path program 192 times [2021-07-09 17:12:27,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:27,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437611743] [2021-07-09 17:12:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:27,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437611743] [2021-07-09 17:12:27,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437611743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784823193] [2021-07-09 17:12:27,625 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:27,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:27,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:27,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:27,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784823193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:27,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:27,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:27,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507800798] [2021-07-09 17:12:27,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:27,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:27,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:27,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:27,848 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:28,566 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-07-09 17:12:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:12:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:28,567 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:12:28,567 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:12:28,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:12:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:12:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-07-09 17:12:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-07-09 17:12:28,568 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-07-09 17:12:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:28,568 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-07-09 17:12:28,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-07-09 17:12:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:28,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:28,569 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:28,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-09 17:12:28,769 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash -206055594, now seen corresponding path program 193 times [2021-07-09 17:12:28,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:28,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426251521] [2021-07-09 17:12:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:28,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:28,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426251521] [2021-07-09 17:12:28,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426251521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:28,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684475895] [2021-07-09 17:12:28,859 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:28,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:29,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684475895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:29,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:29,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:29,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843902483] [2021-07-09 17:12:29,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:29,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:29,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:29,065 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:29,398 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-07-09 17:12:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:29,399 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:12:29,399 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:12:29,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:12:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-07-09 17:12:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-07-09 17:12:29,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-07-09 17:12:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:29,400 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-07-09 17:12:29,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-07-09 17:12:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:29,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:29,401 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:29,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 17:12:29,601 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -588775982, now seen corresponding path program 194 times [2021-07-09 17:12:29,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:29,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409168933] [2021-07-09 17:12:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:29,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:29,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409168933] [2021-07-09 17:12:29,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409168933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:29,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33116929] [2021-07-09 17:12:29,684 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:29,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:29,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:29,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:29,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:29,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33116929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:29,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:29,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:29,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15681055] [2021-07-09 17:12:29,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:29,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:29,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:29,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:29,921 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:30,364 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-07-09 17:12:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:30,365 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:12:30,365 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:12:30,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:12:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:12:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-07-09 17:12:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-07-09 17:12:30,367 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-07-09 17:12:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:30,367 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-07-09 17:12:30,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-07-09 17:12:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:30,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:30,367 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:30,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 17:12:30,581 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1490517846, now seen corresponding path program 195 times [2021-07-09 17:12:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:30,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166791009] [2021-07-09 17:12:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:30,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:30,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166791009] [2021-07-09 17:12:30,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166791009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:30,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943132752] [2021-07-09 17:12:30,681 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:30,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:30,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:30,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943132752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:30,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:30,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314168159] [2021-07-09 17:12:30,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:30,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:30,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:30,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:30,900 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:31,473 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-07-09 17:12:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:12:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:31,474 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:12:31,474 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:12:31,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:12:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-07-09 17:12:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-07-09 17:12:31,477 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-07-09 17:12:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:31,477 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-07-09 17:12:31,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-07-09 17:12:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:31,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:31,478 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:31,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-09 17:12:31,702 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:31,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1505978642, now seen corresponding path program 196 times [2021-07-09 17:12:31,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:31,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104445003] [2021-07-09 17:12:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:31,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:31,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104445003] [2021-07-09 17:12:31,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104445003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:31,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388338222] [2021-07-09 17:12:31,792 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:31,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:31,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:31,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:32,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388338222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:32,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:32,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884126336] [2021-07-09 17:12:32,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:32,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:32,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:32,012 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:32,414 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-07-09 17:12:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:12:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:32,415 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:12:32,415 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:12:32,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:12:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-07-09 17:12:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-07-09 17:12:32,418 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-07-09 17:12:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:32,418 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-07-09 17:12:32,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-07-09 17:12:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:32,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:32,418 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:32,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:32,633 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 423916550, now seen corresponding path program 197 times [2021-07-09 17:12:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:32,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782865190] [2021-07-09 17:12:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:32,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782865190] [2021-07-09 17:12:32,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782865190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395147860] [2021-07-09 17:12:32,715 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:32,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:12:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:32,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:32,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:32,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395147860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:32,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:32,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876006476] [2021-07-09 17:12:32,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:32,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:32,954 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:33,303 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-07-09 17:12:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:33,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:33,304 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:12:33,304 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:12:33,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:12:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-07-09 17:12:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-07-09 17:12:33,306 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-07-09 17:12:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:33,306 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-07-09 17:12:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-07-09 17:12:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:33,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:33,306 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:33,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-09 17:12:33,507 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1791756918, now seen corresponding path program 198 times [2021-07-09 17:12:33,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:33,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123311380] [2021-07-09 17:12:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:33,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123311380] [2021-07-09 17:12:33,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123311380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126185314] [2021-07-09 17:12:33,598 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:33,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:33,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:33,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126185314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:33,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:33,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:33,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169941661] [2021-07-09 17:12:33,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:33,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:33,813 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:34,258 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-07-09 17:12:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:12:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:34,259 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:12:34,259 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:12:34,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:12:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:12:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-07-09 17:12:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-07-09 17:12:34,260 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-07-09 17:12:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:34,260 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-07-09 17:12:34,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-07-09 17:12:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:34,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:34,261 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:34,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 17:12:34,461 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:34,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1776296122, now seen corresponding path program 199 times [2021-07-09 17:12:34,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:34,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096332790] [2021-07-09 17:12:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:34,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:34,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096332790] [2021-07-09 17:12:34,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096332790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:34,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107727969] [2021-07-09 17:12:34,551 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:34,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:34,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107727969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:34,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:34,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:34,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913554500] [2021-07-09 17:12:34,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:34,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:34,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:34,889 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:35,270 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-07-09 17:12:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:35,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:35,271 INFO L225 Difference]: With dead ends: 181 [2021-07-09 17:12:35,271 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:12:35,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:12:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-07-09 17:12:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-09 17:12:35,272 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-07-09 17:12:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:35,272 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-09 17:12:35,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-09 17:12:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:35,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:35,273 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:35,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:35,473 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash 354413842, now seen corresponding path program 200 times [2021-07-09 17:12:35,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:35,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015133561] [2021-07-09 17:12:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:35,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015133561] [2021-07-09 17:12:35,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015133561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173299103] [2021-07-09 17:12:35,564 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:35,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:35,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:35,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:35,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:35,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173299103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:35,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:35,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843338306] [2021-07-09 17:12:35,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:35,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:35,800 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:36,149 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-07-09 17:12:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:36,149 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:12:36,149 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:12:36,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:12:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-07-09 17:12:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-07-09 17:12:36,151 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-07-09 17:12:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:36,151 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-07-09 17:12:36,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-07-09 17:12:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:36,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:36,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:36,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-09 17:12:36,352 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash 369874638, now seen corresponding path program 201 times [2021-07-09 17:12:36,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:36,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579937531] [2021-07-09 17:12:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:36,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579937531] [2021-07-09 17:12:36,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579937531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303965720] [2021-07-09 17:12:36,440 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:36,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:36,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:36,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303965720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:36,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:36,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:36,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297280628] [2021-07-09 17:12:36,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:36,656 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:37,006 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-07-09 17:12:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:37,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:37,007 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:12:37,007 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:12:37,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:12:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-07-09 17:12:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-07-09 17:12:37,009 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-07-09 17:12:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:37,009 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-07-09 17:12:37,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-07-09 17:12:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:37,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:37,009 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:37,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 17:12:37,210 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 941329444, now seen corresponding path program 202 times [2021-07-09 17:12:37,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:37,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235211749] [2021-07-09 17:12:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:37,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235211749] [2021-07-09 17:12:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235211749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286613912] [2021-07-09 17:12:37,293 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:37,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:37,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:37,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286613912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:37,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:37,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:37,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424852174] [2021-07-09 17:12:37,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:37,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:37,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:37,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:37,631 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:38,003 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-07-09 17:12:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:38,004 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:12:38,004 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:12:38,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:12:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-07-09 17:12:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-07-09 17:12:38,005 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-07-09 17:12:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:38,005 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-07-09 17:12:38,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-07-09 17:12:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:38,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:38,006 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:38,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:38,206 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1487538330, now seen corresponding path program 203 times [2021-07-09 17:12:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:38,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535604472] [2021-07-09 17:12:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:38,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:38,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535604472] [2021-07-09 17:12:38,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535604472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:38,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387677177] [2021-07-09 17:12:38,288 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:38,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:12:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:38,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:38,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387677177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:38,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:38,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:38,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310422209] [2021-07-09 17:12:38,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:38,515 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:38,914 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-07-09 17:12:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:38,915 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:12:38,915 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 17:12:38,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 17:12:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-07-09 17:12:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-09 17:12:38,916 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-09 17:12:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:38,916 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-09 17:12:38,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-09 17:12:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:38,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:38,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:39,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 17:12:39,122 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1104817942, now seen corresponding path program 204 times [2021-07-09 17:12:39,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:39,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003219025] [2021-07-09 17:12:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:39,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003219025] [2021-07-09 17:12:39,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003219025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142729711] [2021-07-09 17:12:39,208 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:39,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:39,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142729711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:39,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:39,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:39,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826992745] [2021-07-09 17:12:39,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:39,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:39,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:39,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:39,429 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:39,915 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-07-09 17:12:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:12:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:39,915 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:12:39,915 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:12:39,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:12:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-07-09 17:12:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-07-09 17:12:39,917 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-07-09 17:12:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:39,917 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-07-09 17:12:39,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-07-09 17:12:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:39,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:39,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:40,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:40,118 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1110855526, now seen corresponding path program 205 times [2021-07-09 17:12:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:40,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116754528] [2021-07-09 17:12:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:40,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116754528] [2021-07-09 17:12:40,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116754528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:40,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888405044] [2021-07-09 17:12:40,206 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:40,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:40,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888405044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:40,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:40,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:40,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747001215] [2021-07-09 17:12:40,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:40,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:40,489 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:41,045 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-07-09 17:12:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:12:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:41,046 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:12:41,046 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:12:41,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:12:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:12:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-07-09 17:12:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-07-09 17:12:41,048 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-07-09 17:12:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:41,048 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-07-09 17:12:41,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-07-09 17:12:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:41,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:41,048 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:41,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 17:12:41,249 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1095394730, now seen corresponding path program 206 times [2021-07-09 17:12:41,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:41,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130303781] [2021-07-09 17:12:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:41,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:41,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130303781] [2021-07-09 17:12:41,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130303781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:41,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737073244] [2021-07-09 17:12:41,334 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:41,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:41,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:41,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:41,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737073244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:41,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:41,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:41,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364404003] [2021-07-09 17:12:41,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:41,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:41,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:41,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:41,549 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:42,047 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-07-09 17:12:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:12:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:42,047 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:12:42,048 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:12:42,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:12:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:12:42,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-07-09 17:12:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-07-09 17:12:42,050 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-07-09 17:12:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:42,050 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-07-09 17:12:42,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-07-09 17:12:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:42,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:42,050 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:42,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:42,261 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2117510474, now seen corresponding path program 207 times [2021-07-09 17:12:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:42,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089401400] [2021-07-09 17:12:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:42,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089401400] [2021-07-09 17:12:42,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089401400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789314056] [2021-07-09 17:12:42,343 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:42,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:42,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:42,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:42,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789314056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:42,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:42,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:42,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710932763] [2021-07-09 17:12:42,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:42,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:42,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:42,570 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:42,907 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-07-09 17:12:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:42,908 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:12:42,908 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:12:42,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:12:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-07-09 17:12:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-09 17:12:42,909 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-09 17:12:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:42,909 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-09 17:12:42,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-09 17:12:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:42,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:42,910 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:43,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-07-09 17:12:43,110 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash -98162994, now seen corresponding path program 208 times [2021-07-09 17:12:43,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:43,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724519882] [2021-07-09 17:12:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:43,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:43,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724519882] [2021-07-09 17:12:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724519882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:43,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638577713] [2021-07-09 17:12:43,205 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:43,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:43,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:43,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638577713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:43,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:43,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:43,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120684798] [2021-07-09 17:12:43,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:43,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:43,432 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:43,895 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-07-09 17:12:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:12:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:43,895 INFO L225 Difference]: With dead ends: 195 [2021-07-09 17:12:43,895 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:12:43,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:12:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-07-09 17:12:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-09 17:12:43,897 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-09 17:12:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:43,897 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-09 17:12:43,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-09 17:12:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:43,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:43,897 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:44,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 17:12:44,098 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash -82702198, now seen corresponding path program 209 times [2021-07-09 17:12:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:44,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134766449] [2021-07-09 17:12:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:44,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:44,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134766449] [2021-07-09 17:12:44,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134766449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:44,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360520507] [2021-07-09 17:12:44,185 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:44,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:44,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:44,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:44,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360520507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:44,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:44,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431497649] [2021-07-09 17:12:44,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:44,403 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:44,808 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-07-09 17:12:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:12:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:44,808 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:12:44,809 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:12:44,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:12:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-07-09 17:12:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-09 17:12:44,810 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-09 17:12:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:44,810 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-09 17:12:44,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-09 17:12:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:44,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:44,810 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:45,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:45,011 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2048007766, now seen corresponding path program 210 times [2021-07-09 17:12:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:45,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088742178] [2021-07-09 17:12:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:45,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088742178] [2021-07-09 17:12:45,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088742178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399656812] [2021-07-09 17:12:45,102 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:45,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:45,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:45,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:45,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399656812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:45,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:45,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:45,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835575429] [2021-07-09 17:12:45,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:45,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:45,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:45,381 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:45,863 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-07-09 17:12:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:45,864 INFO L225 Difference]: With dead ends: 195 [2021-07-09 17:12:45,864 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:12:45,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:12:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-07-09 17:12:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-09 17:12:45,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-09 17:12:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:45,866 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-09 17:12:45,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-09 17:12:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:45,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:45,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:46,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-07-09 17:12:46,067 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:46,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2063468562, now seen corresponding path program 211 times [2021-07-09 17:12:46,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:46,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71913961] [2021-07-09 17:12:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:46,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71913961] [2021-07-09 17:12:46,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71913961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003448399] [2021-07-09 17:12:46,153 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:46,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:46,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003448399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:46,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:46,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:46,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880718050] [2021-07-09 17:12:46,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:46,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:46,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:46,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:46,484 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:46,906 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-07-09 17:12:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:46,907 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:12:46,908 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:12:46,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:12:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-07-09 17:12:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-09 17:12:46,910 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-09 17:12:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:46,910 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-09 17:12:46,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-09 17:12:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:46,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:46,911 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:47,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:47,125 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1660043928, now seen corresponding path program 212 times [2021-07-09 17:12:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:47,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298095074] [2021-07-09 17:12:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:47,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:47,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298095074] [2021-07-09 17:12:47,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298095074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:47,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941586683] [2021-07-09 17:12:47,207 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:47,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:47,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:47,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:47,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941586683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:47,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:47,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:47,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081066848] [2021-07-09 17:12:47,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:47,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:47,537 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:47,944 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-07-09 17:12:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:47,945 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:12:47,945 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:12:47,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:12:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-07-09 17:12:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-07-09 17:12:47,946 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-07-09 17:12:47,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:47,946 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-07-09 17:12:47,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-07-09 17:12:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:47,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:47,947 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:48,149 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1291658542, now seen corresponding path program 213 times [2021-07-09 17:12:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34204586] [2021-07-09 17:12:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:48,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:48,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34204586] [2021-07-09 17:12:48,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34204586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776364454] [2021-07-09 17:12:48,232 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:48,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:48,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:48,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776364454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:48,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753257112] [2021-07-09 17:12:48,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:48,480 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:48,659 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-07-09 17:12:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:48,660 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:12:48,660 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:12:48,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:12:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-07-09 17:12:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-09 17:12:48,661 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-09 17:12:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:48,661 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-09 17:12:48,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-09 17:12:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:48,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,661 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 17:12:48,862 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 787635286, now seen corresponding path program 214 times [2021-07-09 17:12:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804330333] [2021-07-09 17:12:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:48,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:48,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804330333] [2021-07-09 17:12:48,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804330333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801829061] [2021-07-09 17:12:48,951 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:48,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:48,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:48,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:49,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801829061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:49,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:49,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741852384] [2021-07-09 17:12:49,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:49,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:49,183 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:49,569 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-07-09 17:12:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:49,570 INFO L225 Difference]: With dead ends: 162 [2021-07-09 17:12:49,570 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:12:49,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:12:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-07-09 17:12:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-07-09 17:12:49,572 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-07-09 17:12:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:49,572 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-07-09 17:12:49,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-07-09 17:12:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:49,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:49,572 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:49,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,773 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash 803096082, now seen corresponding path program 215 times [2021-07-09 17:12:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:49,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878921951] [2021-07-09 17:12:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:49,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878921951] [2021-07-09 17:12:49,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878921951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15055627] [2021-07-09 17:12:49,863 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:49,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15055627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947209370] [2021-07-09 17:12:50,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:50,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:50,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:50,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:50,086 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:50,453 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-07-09 17:12:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:50,453 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:12:50,453 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:12:50,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:12:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-07-09 17:12:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-07-09 17:12:50,455 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-07-09 17:12:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:50,455 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-07-09 17:12:50,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-07-09 17:12:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:50,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:50,455 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:50,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 17:12:50,656 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:50,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1361161250, now seen corresponding path program 216 times [2021-07-09 17:12:50,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:50,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949026898] [2021-07-09 17:12:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:50,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:50,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949026898] [2021-07-09 17:12:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949026898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650071710] [2021-07-09 17:12:50,764 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:50,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:50,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:50,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:50,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:50,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650071710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:50,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:50,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553162394] [2021-07-09 17:12:50,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:50,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:50,989 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:51,315 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-07-09 17:12:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:51,316 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:12:51,316 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:12:51,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:12:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-07-09 17:12:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-07-09 17:12:51,318 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-07-09 17:12:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:51,318 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-07-09 17:12:51,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-07-09 17:12:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:51,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:51,318 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:51,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-09 17:12:51,518 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1345700454, now seen corresponding path program 217 times [2021-07-09 17:12:51,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:51,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080676871] [2021-07-09 17:12:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:51,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:51,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080676871] [2021-07-09 17:12:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080676871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843032602] [2021-07-09 17:12:51,646 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:51,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843032602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:51,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:51,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906273032] [2021-07-09 17:12:51,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:51,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:51,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:51,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:51,885 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:52,195 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-07-09 17:12:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:52,195 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:12:52,196 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 17:12:52,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 17:12:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-07-09 17:12:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-09 17:12:52,197 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-09 17:12:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:52,197 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-09 17:12:52,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-09 17:12:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:52,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:52,200 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:52,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-09 17:12:52,400 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash -774245648, now seen corresponding path program 218 times [2021-07-09 17:12:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735812059] [2021-07-09 17:12:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:52,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:52,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735812059] [2021-07-09 17:12:52,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735812059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:52,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483534059] [2021-07-09 17:12:52,486 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:52,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:52,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483534059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:52,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:52,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:52,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571628706] [2021-07-09 17:12:52,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:52,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:52,699 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:52,977 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-07-09 17:12:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:52,977 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:12:52,977 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:12:52,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:12:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-07-09 17:12:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-07-09 17:12:52,979 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-07-09 17:12:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:52,979 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-07-09 17:12:52,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-07-09 17:12:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:52,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:52,979 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:53,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:53,180 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1839714458, now seen corresponding path program 219 times [2021-07-09 17:12:53,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:53,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026226188] [2021-07-09 17:12:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:53,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026226188] [2021-07-09 17:12:53,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026226188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010396139] [2021-07-09 17:12:53,277 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:53,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:12:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:53,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:53,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010396139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:53,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:53,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:53,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510497256] [2021-07-09 17:12:53,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:53,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:53,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:53,494 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:53,842 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-07-09 17:12:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:53,842 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:12:53,842 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:12:53,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:12:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-07-09 17:12:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-07-09 17:12:53,844 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-07-09 17:12:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-07-09 17:12:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-07-09 17:12:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:53,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:53,844 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:54,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:54,045 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:54,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1855175254, now seen corresponding path program 220 times [2021-07-09 17:12:54,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:54,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196040607] [2021-07-09 17:12:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:54,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196040607] [2021-07-09 17:12:54,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196040607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413079898] [2021-07-09 17:12:54,135 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:54,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:54,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:54,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413079898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:54,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:54,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:54,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644745665] [2021-07-09 17:12:54,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:54,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:54,345 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:54,770 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-07-09 17:12:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:54,771 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:12:54,771 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:12:54,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:12:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-07-09 17:12:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-07-09 17:12:54,773 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-07-09 17:12:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:54,773 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-07-09 17:12:54,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-07-09 17:12:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:54,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:54,773 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:54,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-09 17:12:54,974 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1868337236, now seen corresponding path program 221 times [2021-07-09 17:12:54,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:54,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044958362] [2021-07-09 17:12:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:55,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:55,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044958362] [2021-07-09 17:12:55,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044958362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575447491] [2021-07-09 17:12:55,058 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:55,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:55,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:55,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575447491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:55,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334722010] [2021-07-09 17:12:55,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:55,279 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:55,676 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-07-09 17:12:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:55,676 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:12:55,676 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:12:55,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:12:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-07-09 17:12:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-07-09 17:12:55,678 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-07-09 17:12:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:55,678 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-07-09 17:12:55,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-07-09 17:12:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:55,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:55,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:55,879 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1265651738, now seen corresponding path program 5 times [2021-07-09 17:12:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:55,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765526860] [2021-07-09 17:12:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:55,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:55,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765526860] [2021-07-09 17:12:55,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765526860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:55,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932162029] [2021-07-09 17:12:55,961 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:55,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:12:55,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:55,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:12:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:56,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932162029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:56,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:12:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237140027] [2021-07-09 17:12:56,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:56,076 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-07-09 17:12:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:56,297 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-07-09 17:12:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:12:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 19 [2021-07-09 17:12:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:56,297 INFO L225 Difference]: With dead ends: 147 [2021-07-09 17:12:56,297 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:12:56,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:12:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-07-09 17:12:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-09 17:12:56,299 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-09 17:12:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:56,299 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-09 17:12:56,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-07-09 17:12:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-09 17:12:56,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:12:56,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:56,299 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:56,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-07-09 17:12:56,500 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1888774482, now seen corresponding path program 222 times [2021-07-09 17:12:56,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:56,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467991788] [2021-07-09 17:12:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:56,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:56,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467991788] [2021-07-09 17:12:56,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467991788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776048479] [2021-07-09 17:12:56,583 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:56,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:12:56,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:56,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:56,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:56,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776048479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:56,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:56,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:12:56,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088879077] [2021-07-09 17:12:56,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:12:56,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:12:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:56,794 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:57,229 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-07-09 17:12:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:12:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-07-09 17:12:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:57,230 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:12:57,230 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:12:57,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:12:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:12:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-07-09 17:12:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-09 17:12:57,232 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-09 17:12:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:57,232 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-09 17:12:57,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-09 17:12:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-09 17:12:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:12:57,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:57,232 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:57,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:57,433 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash -26764772, now seen corresponding path program 5 times [2021-07-09 17:12:57,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:57,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751612673] [2021-07-09 17:12:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:57,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:57,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751612673] [2021-07-09 17:12:57,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751612673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:57,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581231686] [2021-07-09 17:12:57,527 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:57,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:12:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:12:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581231686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:12:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366604009] [2021-07-09 17:12:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:57,662 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-07-09 17:12:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:57,948 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-07-09 17:12:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:57,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21 [2021-07-09 17:12:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:57,949 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:12:57,949 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:12:57,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:12:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-09 17:12:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-09 17:12:57,951 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-07-09 17:12:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:57,951 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-09 17:12:57,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-07-09 17:12:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-09 17:12:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:12:57,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:57,951 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:58,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-09 17:12:58,165 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:58,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1997566364, now seen corresponding path program 223 times [2021-07-09 17:12:58,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:58,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007678408] [2021-07-09 17:12:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:58,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:58,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007678408] [2021-07-09 17:12:58,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007678408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:58,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597977685] [2021-07-09 17:12:58,272 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:58,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:12:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:59,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597977685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:59,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:59,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:12:59,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949730725] [2021-07-09 17:12:59,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:12:59,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:12:59,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:59,519 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:12:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:59,959 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-07-09 17:12:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:12:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:59,960 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:12:59,960 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:12:59,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:12:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-07-09 17:12:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-09 17:12:59,962 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-07-09 17:12:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:59,962 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-09 17:12:59,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:12:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-09 17:12:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:12:59,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:59,962 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:00,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-09 17:13:00,162 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1614845976, now seen corresponding path program 224 times [2021-07-09 17:13:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:00,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74018814] [2021-07-09 17:13:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:00,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:00,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74018814] [2021-07-09 17:13:00,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74018814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006789000] [2021-07-09 17:13:00,276 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:00,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:00,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:00,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:00,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:00,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006789000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:00,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:00,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:13:00,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5724184] [2021-07-09 17:13:00,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:00,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:00,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:00,530 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:00,917 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-07-09 17:13:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:13:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:00,918 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:13:00,918 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:13:00,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:13:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:13:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-07-09 17:13:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-09 17:13:00,919 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-07-09 17:13:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:00,919 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-09 17:13:00,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-09 17:13:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:00,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:00,920 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:01,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-09 17:13:01,120 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash -600827492, now seen corresponding path program 225 times [2021-07-09 17:13:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:01,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575404527] [2021-07-09 17:13:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:01,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:01,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575404527] [2021-07-09 17:13:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575404527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928343944] [2021-07-09 17:13:01,230 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:01,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:13:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:01,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:01,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928343944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:01,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:01,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:13:01,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845499984] [2021-07-09 17:13:01,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:01,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:01,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:01,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:01,457 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:01,911 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-07-09 17:13:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:13:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:01,912 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:13:01,912 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:13:01,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:13:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:13:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-07-09 17:13:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-07-09 17:13:01,914 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-07-09 17:13:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:01,914 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-07-09 17:13:01,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-07-09 17:13:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:01,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:01,914 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:02,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 17:13:02,117 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -585366696, now seen corresponding path program 226 times [2021-07-09 17:13:02,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:02,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046253237] [2021-07-09 17:13:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:02,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046253237] [2021-07-09 17:13:02,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046253237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541543349] [2021-07-09 17:13:02,229 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:02,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:02,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:02,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541543349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:02,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:02,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:13:02,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321431383] [2021-07-09 17:13:02,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:02,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:02,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:02,635 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:03,126 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-07-09 17:13:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:13:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:03,127 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:13:03,127 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:13:03,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:13:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:13:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-07-09 17:13:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-07-09 17:13:03,129 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-07-09 17:13:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:03,129 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-07-09 17:13:03,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-07-09 17:13:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:03,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:03,130 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:03,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-09 17:13:03,345 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1736931496, now seen corresponding path program 227 times [2021-07-09 17:13:03,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:03,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770575929] [2021-07-09 17:13:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:03,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:03,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770575929] [2021-07-09 17:13:03,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770575929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:03,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746626380] [2021-07-09 17:13:03,456 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:03,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:13:03,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:03,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:03,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:04,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746626380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:04,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:04,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:13:04,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040953473] [2021-07-09 17:13:04,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:04,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:04,729 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:05,238 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-07-09 17:13:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:13:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:05,239 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:13:05,239 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:13:05,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:13:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:13:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-07-09 17:13:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-07-09 17:13:05,241 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-07-09 17:13:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:05,241 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-07-09 17:13:05,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-07-09 17:13:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:05,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:05,241 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:05,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:05,441 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:05,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1721470700, now seen corresponding path program 228 times [2021-07-09 17:13:05,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:05,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968104434] [2021-07-09 17:13:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:05,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:05,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968104434] [2021-07-09 17:13:05,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968104434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:05,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743129585] [2021-07-09 17:13:05,606 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:05,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:13:05,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:05,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:05,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743129585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:05,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:05,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:13:05,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858099540] [2021-07-09 17:13:05,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:05,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:05,849 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:06,257 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-07-09 17:13:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:13:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:06,258 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:13:06,258 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:13:06,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:13:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:13:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-07-09 17:13:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-09 17:13:06,259 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-07-09 17:13:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:06,259 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-09 17:13:06,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-09 17:13:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:06,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:06,260 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:06,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-07-09 17:13:06,460 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1150015894, now seen corresponding path program 229 times [2021-07-09 17:13:06,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:06,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351276230] [2021-07-09 17:13:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:06,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351276230] [2021-07-09 17:13:06,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351276230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527916968] [2021-07-09 17:13:06,563 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:06,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:06,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527916968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:06,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:13:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005865679] [2021-07-09 17:13:06,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:06,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:06,794 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:07,004 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-07-09 17:13:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-07-09 17:13:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:07,004 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:13:07,004 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:13:07,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:13:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-09 17:13:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-09 17:13:07,006 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-07-09 17:13:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:07,006 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-09 17:13:07,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-07-09 17:13:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-09 17:13:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:13:07,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:07,006 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:07,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 17:13:07,207 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1759602972, now seen corresponding path program 230 times [2021-07-09 17:13:07,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:07,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576855228] [2021-07-09 17:13:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:07,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:07,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576855228] [2021-07-09 17:13:07,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576855228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:07,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864756129] [2021-07-09 17:13:07,317 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:07,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:07,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:13:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-09 17:24:15,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:15,976 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:24:15,978 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:24:15,980 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:24:15,980 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:24:15 BasicIcfg [2021-07-09 17:24:15,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:24:15,981 INFO L168 Benchmark]: Toolchain (without parser) took 877870.12 ms. Allocated memory was 184.5 MB in the beginning and 715.1 MB in the end (delta: 530.6 MB). Free memory was 165.6 MB in the beginning and 317.5 MB in the end (delta: -151.9 MB). Peak memory consumption was 445.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:15,981 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 184.5 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:24:15,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.61 ms. Allocated memory is still 184.5 MB. Free memory was 165.5 MB in the beginning and 164.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:15,981 INFO L168 Benchmark]: Boogie Preprocessor took 12.22 ms. Allocated memory is still 184.5 MB. Free memory was 164.0 MB in the beginning and 163.1 MB in the end (delta: 953.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:15,981 INFO L168 Benchmark]: RCFGBuilder took 216.90 ms. Allocated memory is still 184.5 MB. Free memory was 163.1 MB in the beginning and 151.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:15,981 INFO L168 Benchmark]: TraceAbstraction took 877614.82 ms. Allocated memory was 184.5 MB in the beginning and 715.1 MB in the end (delta: 530.6 MB). Free memory was 151.1 MB in the beginning and 317.5 MB in the end (delta: -166.4 MB). Peak memory consumption was 429.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:24:15,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 184.5 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.61 ms. Allocated memory is still 184.5 MB. Free memory was 165.5 MB in the beginning and 164.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.22 ms. Allocated memory is still 184.5 MB. Free memory was 164.0 MB in the beginning and 163.1 MB in the end (delta: 953.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 216.90 ms. Allocated memory is still 184.5 MB. Free memory was 163.1 MB in the beginning and 151.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 877614.82 ms. Allocated memory was 184.5 MB in the beginning and 715.1 MB in the end (delta: 530.6 MB). Free memory was 151.1 MB in the beginning and 317.5 MB in the end (delta: -166.4 MB). Peak memory consumption was 429.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 877522.4ms, OverallIterations: 241, TraceHistogramMax: 5, EmptinessCheckTime: 75.0ms, AutomataDifference: 80761.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5334 SDtfs, 15521 SDslu, 40872 SDs, 0 SdLazy, 83396 SolverSat, 2068 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33440.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7860 GetRequests, 2318 SyntacticMatches, 287 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26016 ImplicationChecksByTransitivity, 88454.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=189, InterpolantAutomatonStates: 3673, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 467.1ms AutomataMinimizationTime, 240 MinimizatonAttempts, 10667 StatesRemovedByMinimization, 240 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 622.8ms SsaConstructionTime, 1862.6ms SatisfiabilityAnalysisTime, 71025.1ms InterpolantComputationTime, 8681 NumberOfCodeBlocks, 8681 NumberOfCodeBlocksAsserted, 840 NumberOfCheckSat, 8202 ConstructedInterpolants, 0 QuantifiedInterpolants, 166902 SizeOfPredicates, 1394 NumberOfNonLiveVariables, 12391 ConjunctsInSsa, 5771 ConjunctsInUnsatCore, 479 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3694 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown